Added: tinkerpop/site/docs/4.0.0-beta.1/dev/future/index.html URL: http://svn.apache.org/viewvc/tinkerpop/site/docs/4.0.0-beta.1/dev/future/index.html?rev=1923192&view=auto ============================================================================== --- tinkerpop/site/docs/4.0.0-beta.1/dev/future/index.html (added) +++ tinkerpop/site/docs/4.0.0-beta.1/dev/future/index.html Fri Jan 17 22:45:40 2025 @@ -0,0 +1,1465 @@ +<!DOCTYPE html> +<html lang="en"> +<head> +<meta charset="UTF-8"> +<meta http-equiv="X-UA-Compatible" content="IE=edge"> +<meta name="viewport" content="width=device-width, initial-scale=1.0"> +<meta name="generator" content="Asciidoctor 2.0.18"> +<title>TinkerPop Future</title> +<style> +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +/*! normalize.css v2.1.2 | MIT License | git.io/normalize */ +/* ========================================================================== HTML5 display definitions ========================================================================== */ +/** Correct `block` display not defined in IE 8/9. */ +@import url(http://cdnjs.cloudflare.com/ajax/libs/font-awesome/3.2.1/css/font-awesome.css); +article, aside, details, figcaption, figure, footer, header, hgroup, main, nav, section, summary { display: block; } + +/** Correct `inline-block` display not defined in IE 8/9. */ +audio, canvas, video { display: inline-block; } + +/** Prevent modern browsers from displaying `audio` without controls. Remove excess height in iOS 5 devices. */ +audio:not([controls]) { display: none; height: 0; } + +/** Address `[hidden]` styling not present in IE 8/9. Hide the `template` element in IE, Safari, and Firefox < 22. */ +[hidden], template { display: none; } + +script { display: none !important; } + +/* ========================================================================== Base ========================================================================== */ +/** 1. Set default font family to sans-serif. 2. Prevent iOS text size adjust after orientation change, without disabling user zoom. */ +html { font-family: sans-serif; /* 1 */ -ms-text-size-adjust: 100%; /* 2 */ -webkit-text-size-adjust: 100%; /* 2 */ } + +/** Remove default margin. */ +body { margin: 0; } + +/* ========================================================================== Links ========================================================================== */ +/** Remove the gray background color from active links in IE 10. */ +a { background: transparent; } + +/** Address `outline` inconsistency between Chrome and other browsers. */ +a:focus { outline: thin dotted; } + +/** Improve readability when focused and also mouse hovered in all browsers. */ +a:active, a:hover { outline: 0; } + +/* ========================================================================== Typography ========================================================================== */ +/** Address variable `h1` font-size and margin within `section` and `article` contexts in Firefox 4+, Safari 5, and Chrome. */ +h1 { font-size: 2em; margin: 0.67em 0; } + +/** Address styling not present in IE 8/9, Safari 5, and Chrome. */ +abbr[title] { border-bottom: 1px dotted; } + +/** Address style set to `bolder` in Firefox 4+, Safari 5, and Chrome. */ +b, strong { font-weight: bold; } + +/** Address styling not present in Safari 5 and Chrome. */ +dfn { font-style: italic; } + +/** Address differences between Firefox and other browsers. */ +hr { -moz-box-sizing: content-box; box-sizing: content-box; height: 0; } + +/** Address styling not present in IE 8/9. */ +mark { background: #ff0; color: #000; } + +/** Correct font family set oddly in Safari 5 and Chrome. */ +code, kbd, pre, samp { font-family: monospace, serif; font-size: 1em; } + +/** Improve readability of pre-formatted text in all browsers. */ +pre { white-space: pre-wrap; } + +/** Set consistent quote types. */ +q { quotes: "\201C" "\201D" "\2018" "\2019"; } + +/** Address inconsistent and variable font size in all browsers. */ +small { font-size: 80%; } + +/** Prevent `sub` and `sup` affecting `line-height` in all browsers. */ +sub, sup { font-size: 75%; line-height: 0; position: relative; vertical-align: baseline; } + +sup { top: -0.5em; } + +sub { bottom: -0.25em; } + +/* ========================================================================== Embedded content ========================================================================== */ +/** Remove border when inside `a` element in IE 8/9. */ +img { border: 0; } + +/** Correct overflow displayed oddly in IE 9. */ +svg:not(:root) { overflow: hidden; } + +/* ========================================================================== Figures ========================================================================== */ +/** Address margin not present in IE 8/9 and Safari 5. */ +figure { margin: 0; } + +/* ========================================================================== Forms ========================================================================== */ +/** Define consistent border, margin, and padding. */ +fieldset { border: 1px solid #c0c0c0; margin: 0 2px; padding: 0.35em 0.625em 0.75em; } + +/** 1. Correct `color` not being inherited in IE 8/9. 2. Remove padding so people aren't caught out if they zero out fieldsets. */ +legend { border: 0; /* 1 */ padding: 0; /* 2 */ } + +/** 1. Correct font family not being inherited in all browsers. 2. Correct font size not being inherited in all browsers. 3. Address margins set differently in Firefox 4+, Safari 5, and Chrome. */ +button, input, select, textarea { font-family: inherit; /* 1 */ font-size: 100%; /* 2 */ margin: 0; /* 3 */ } + +/** Address Firefox 4+ setting `line-height` on `input` using `!important` in the UA stylesheet. */ +button, input { line-height: normal; } + +/** Address inconsistent `text-transform` inheritance for `button` and `select`. All other form control elements do not inherit `text-transform` values. Correct `button` style inheritance in Chrome, Safari 5+, and IE 8+. Correct `select` style inheritance in Firefox 4+ and Opera. */ +button, select { text-transform: none; } + +/** 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio` and `video` controls. 2. Correct inability to style clickable `input` types in iOS. 3. Improve usability and consistency of cursor style between image-type `input` and others. */ +button, html input[type="button"], input[type="reset"], input[type="submit"] { -webkit-appearance: button; /* 2 */ cursor: pointer; /* 3 */ } + +/** Re-set default cursor for disabled elements. */ +button[disabled], html input[disabled] { cursor: default; } + +/** 1. Address box sizing set to `content-box` in IE 8/9. 2. Remove excess padding in IE 8/9. */ +input[type="checkbox"], input[type="radio"] { box-sizing: border-box; /* 1 */ padding: 0; /* 2 */ } + +/** 1. Address `appearance` set to `searchfield` in Safari 5 and Chrome. 2. Address `box-sizing` set to `border-box` in Safari 5 and Chrome (include `-moz` to future-proof). */ +input[type="search"] { -webkit-appearance: textfield; /* 1 */ -moz-box-sizing: content-box; -webkit-box-sizing: content-box; /* 2 */ box-sizing: content-box; } + +/** Remove inner padding and search cancel button in Safari 5 and Chrome on OS X. */ +input[type="search"]::-webkit-search-cancel-button, input[type="search"]::-webkit-search-decoration { -webkit-appearance: none; } + +/** Remove inner padding and border in Firefox 4+. */ +button::-moz-focus-inner, input::-moz-focus-inner { border: 0; padding: 0; } + +/** 1. Remove default vertical scrollbar in IE 8/9. 2. Improve readability and alignment in all browsers. */ +textarea { overflow: auto; /* 1 */ vertical-align: top; /* 2 */ } + +/* ========================================================================== Tables ========================================================================== */ +/** Remove most spacing between table cells. */ +table { border-collapse: collapse; border-spacing: 0; } + +meta.foundation-mq-small { font-family: "only screen and (min-width: 768px)"; width: 768px; } + +meta.foundation-mq-medium { font-family: "only screen and (min-width:1280px)"; width: 1280px; } + +meta.foundation-mq-large { font-family: "only screen and (min-width:1440px)"; width: 1440px; } + +*, *:before, *:after { -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box; } + +html, body { font-size: 100%; } + +body { background: white; color: #222222; padding: 0; margin: 0; font-family: "Helvetica Neue", "Helvetica", Helvetica, Arial, sans-serif; font-weight: normal; font-style: normal; line-height: 1; position: relative; cursor: auto; } + +a:hover { cursor: pointer; } + +img, object, embed { max-width: 100%; height: auto; } + +object, embed { height: 100%; } + +img { -ms-interpolation-mode: bicubic; } + +#map_canvas img, #map_canvas embed, #map_canvas object, .map_canvas img, .map_canvas embed, .map_canvas object { max-width: none !important; } + +.left { float: left !important; } + +.right { float: right !important; } + +.text-left { text-align: left !important; } + +.text-right { text-align: right !important; } + +.text-center { text-align: center !important; } + +.text-justify { text-align: justify !important; } + +.hide { display: none; } + +.antialiased, body { -webkit-font-smoothing: antialiased; } + +img { display: inline-block; vertical-align: middle; } + +textarea { height: auto; min-height: 50px; } + +select { width: 100%; } + +p.lead, .paragraph.lead > p, #preamble > .sectionbody > .paragraph:first-of-type p { font-size: 1.21875em; line-height: 1.6; } + +.subheader, #content #toctitle, .admonitionblock td.content > .title, .exampleblock > .title, .imageblock > .title, .listingblock > .title, .literalblock > .title, .mathblock > .title, .openblock > .title, .paragraph > .title, .quoteblock > .title, .sidebarblock > .title, .tableblock > .title, .verseblock > .title, .videoblock > .title, .dlist > .title, .olist > .title, .ulist > .title, .qlist > .title, .hdlist > .title, .tableblock > caption { line-height: 1.4; color: #6c818f; font-weight: 300; margin-top: 0.2em; margin-bottom: 0.5em; } + +/* Typography resets */ +div, dl, dt, dd, ul, ol, li, h1, h2, h3, #toctitle, .sidebarblock > .content > .title, h4, h5, h6, pre, form, p, blockquote, th, td { margin: 0; padding: 0; direction: ltr; } + +/* Default Link Styles */ +a { color: #444444; text-decoration: underline; line-height: inherit; } +a:hover, a:focus { color: #111111; } +a img { border: none; } + +/* Default paragraph styles */ +p { font-family: inherit; font-weight: normal; font-size: 1em; line-height: 1.5; margin-bottom: 1.25em; text-rendering: optimizeLegibility; } +p aside { font-size: 0.875em; line-height: 1.35; font-style: italic; } + +/* Default header styles */ +h1, h2, h3, #toctitle, .sidebarblock > .content > .title, h4, h5, h6 { font-family: ff-meta-web-pro-1, ff-meta-web-pro-2, Arial, "Helvetica Neue", sans-serif; font-weight: bold; font-style: normal; color: #465158; text-rendering: optimizeLegibility; margin-top: 1em; margin-bottom: 0.5em; line-height: 1.2125em; } +h1 small, h2 small, h3 small, #toctitle small, .sidebarblock > .content > .title small, h4 small, h5 small, h6 small { font-size: 60%; color: #909ea7; line-height: 0; } + +h1 { font-size: 2.125em; } + +h2 { font-size: 1.6875em; } + +h3, #toctitle, .sidebarblock > .content > .title { font-size: 1.375em; } + +h4 { font-size: 1.125em; } + +h5 { font-size: 1.125em; } + +h6 { font-size: 1em; } + +hr { border: solid #dddddd; border-width: 1px 0 0; clear: both; margin: 1.25em 0 1.1875em; height: 0; } + +/* Helpful Typography Defaults */ +em, i { font-style: italic; line-height: inherit; } + +strong, b { font-weight: bold; line-height: inherit; } + +small { font-size: 60%; line-height: inherit; } + +code { font-family: "Consolas", "Deja Vu Sans Mono", "Bitstream Vera Sans Mono", monospace; font-weight: normal; color: #444444; } + +/* Lists */ +ul, ol, dl { font-size: 1em; line-height: 1.5; margin-bottom: 1.25em; list-style-position: outside; font-family: inherit; } + +ul, ol { margin-left: 0; } +ul.no-bullet, ol.no-bullet { margin-left: 0; } + +/* Unordered Lists */ +ul li ul, ul li ol { margin-left: 1.25em; margin-bottom: 0; font-size: 1em; /* Override nested font-size change */ } +ul.square li ul, ul.circle li ul, ul.disc li ul { list-style: inherit; } +ul.square { list-style-type: square; } +ul.circle { list-style-type: circle; } +ul.disc { list-style-type: disc; } +ul.no-bullet { list-style: none; } + +/* Ordered Lists */ +ol li ul, ol li ol { margin-left: 1.25em; margin-bottom: 0; } + +/* Definition Lists */ +dl dt { margin-bottom: 0.3em; font-weight: bold; } +dl dd { margin-bottom: 0.75em; } + +/* Abbreviations */ +abbr, acronym { text-transform: uppercase; font-size: 90%; color: black; border-bottom: 1px dotted #dddddd; cursor: help; } + +abbr { text-transform: none; } + +/* Blockquotes */ +blockquote { margin: 0 0 1.25em; padding: 0.5625em 1.25em 0 1.1875em; border-left: 1px solid #dddddd; } +blockquote cite { display: block; font-size: 0.8125em; color: #748590; } +blockquote cite:before { content: "\2014 \0020"; } +blockquote cite a, blockquote cite a:visited { color: #748590; } + +blockquote, blockquote p { line-height: 1.5; color: #909ea7; } + +/* Microformats */ +.vcard { display: inline-block; margin: 0 0 1.25em 0; border: 1px solid #dddddd; padding: 0.625em 0.75em; } +.vcard li { margin: 0; display: block; } +.vcard .fn { font-weight: bold; font-size: 0.9375em; } + +.vevent .summary { font-weight: bold; } +.vevent abbr { cursor: auto; text-decoration: none; font-weight: bold; border: none; padding: 0 0.0625em; } + +@media only screen and (min-width: 768px) { h1, h2, h3, #toctitle, .sidebarblock > .content > .title, h4, h5, h6 { line-height: 1.4; } + h1 { font-size: 2.75em; } + h2 { font-size: 2.3125em; } + h3, #toctitle, .sidebarblock > .content > .title { font-size: 1.6875em; } + h4 { font-size: 1.4375em; } } +/* Print styles. Inlined to avoid required HTTP connection: www.phpied.com/delay-loading-your-print-css/ Credit to Paul Irish and HTML5 Boilerplate (html5boilerplate.com) +*/ +.print-only { display: none !important; } + +@media print { * { background: transparent !important; color: #000 !important; /* Black prints faster: h5bp.com/s */ box-shadow: none !important; text-shadow: none !important; } + a, a:visited { text-decoration: underline; } + a[href]:after { content: " (" attr(href) ")"; } + abbr[title]:after { content: " (" attr(title) ")"; } + .ir a:after, a[href^="javascript:"]:after, a[href^="#"]:after { content: ""; } + pre, blockquote { border: 1px solid #999; page-break-inside: avoid; } + thead { display: table-header-group; /* h5bp.com/t */ } + tr, img { page-break-inside: avoid; } + img { max-width: 100% !important; } + @page { margin: 0.5cm; } + p, h2, h3, #toctitle, .sidebarblock > .content > .title { orphans: 3; widows: 3; } + h2, h3, #toctitle, .sidebarblock > .content > .title { page-break-after: avoid; } + .hide-on-print { display: none !important; } + .print-only { display: block !important; } + .hide-for-print { display: none !important; } + .show-for-print { display: inherit !important; } } +/* Tables */ +table { background: white; margin-bottom: 1.25em; border: solid 0 #dddddd; } +table thead, table tfoot { background: none; font-weight: bold; } +table thead tr th, table thead tr td, table tfoot tr th, table tfoot tr td { padding: 1px 8px 1px 5px; font-size: 1em; color: #222222; text-align: left; } +table tr th, table tr td { padding: 1px 8px 1px 5px; font-size: 1em; color: #222222; } +table tr.even, table tr.alt, table tr:nth-of-type(even) { background: none; } +table thead tr th, table tfoot tr th, table tbody tr td, table tr td, table tfoot tr td { display: table-cell; line-height: 1.5; } + +.clearfix:before, .clearfix:after, .float-group:before, .float-group:after { content: " "; display: table; } +.clearfix:after, .float-group:after { clear: both; } + +*:not(pre) > code { font-size: 0.95em; padding: 0; white-space: nowrap; background-color: #f2f2f2; border: 0 solid #dddddd; -webkit-border-radius: 6px; border-radius: 6px; text-shadow: none; } + +pre, pre > code { line-height: 1.2; color: inherit; font-family: "Consolas", "Deja Vu Sans Mono", "Bitstream Vera Sans Mono", monospace; font-weight: normal; } + +.keyseq { color: #333333; } + +kbd:not(.keyseq) { display: inline-block; color: black; font-size: 0.75em; line-height: 1.4; background-color: #F7F7F7; border: 1px solid #ccc; -webkit-border-radius: 3px; border-radius: 3px; -webkit-box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2), 0 0 0 2px white inset; box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2), 0 0 0 2px white inset; margin: -0.15em 0.15em 0 0.15em; padding: 0.2em 0.6em 0.2em 0.5em; vertical-align: middle; white-space: nowrap; } + +.keyseq kbd:first-child { margin-left: 0; } + +.keyseq kbd:last-child { margin-right: 0; } + +.menuseq, .menu { color: black; } + +b.button:before, b.button:after { position: relative; top: -1px; font-weight: normal; } + +b.button:before { content: "["; padding: 0 3px 0 2px; } + +b.button:after { content: "]"; padding: 0 2px 0 3px; } + +p a > code:hover { color: #373737; } + +#header, #content, #footnotes, #footer { width: 100%; margin-left: auto; margin-right: auto; margin-top: 0; margin-bottom: 0; max-width: 62.5em; *zoom: 1; position: relative; padding-left: 0.9375em; padding-right: 0.9375em; } +#header:before, #header:after, #content:before, #content:after, #footnotes:before, #footnotes:after, #footer:before, #footer:after { content: " "; display: table; } +#header:after, #content:after, #footnotes:after, #footer:after { clear: both; } + +#header { margin-bottom: 2.5em; } +#header > h1 { color: #111111; font-weight: bold; border-bottom: 1px solid #dddddd; margin-bottom: -28px; padding-bottom: 32px; } +#header span { color: #909ea7; } +#header #revnumber { text-transform: capitalize; } +#header br { display: none; } +#header br + span { padding-left: 3px; } +#header br + span:before { content: "\2013 \0020"; } +#header br + span.author { padding-left: 0; } +#header br + span.author:before { content: ", "; } + +#toc { border-bottom: 1px solid #dddddd; padding-bottom: 1.25em; } +#toc > ul { margin-left: 0.25em; } +#toc ul.sectlevel0 > li > a { font-style: italic; } +#toc ul.sectlevel0 ul.sectlevel1 { margin-left: 0; margin-top: 0.5em; margin-bottom: 0.5em; } +#toc ul { list-style-type: none; } + +#toctitle { color: #6c818f; } + +@media only screen and (min-width: 768px) { body.toc2 { padding-left: 15em; padding-right: 0; } + #toc.toc2 { position: fixed; width: 15em; left: 0; top: 0; border-right: 1px solid #dddddd; border-bottom: 0; z-index: 1000; padding: 1em; height: 100%; overflow: auto; } + #toc.toc2 #toctitle { margin-top: 0; font-size: 1.2em; } + #toc.toc2 > ul { font-size: .90em; } + #toc.toc2 ul ul { margin-left: 0; padding-left: 1em; } + #toc.toc2 ul.sectlevel0 ul.sectlevel1 { padding-left: 0; margin-top: 0.5em; margin-bottom: 0.5em; } + body.toc2.toc-right { padding-left: 0; padding-right: 15em; } + body.toc2.toc-right #toc.toc2 { border-right: 0; border-left: 1px solid #dddddd; left: auto; right: 0; } } +@media only screen and (min-width: 1280px) { body.toc2 { padding-left: 20em; padding-right: 0; } + #toc.toc2 { width: 20em; } + #toc.toc2 #toctitle { font-size: 1.375em; } + #toc.toc2 > ul { font-size: 0.95em; } + #toc.toc2 ul ul { padding-left: 1.25em; } + body.toc2.toc-right { padding-left: 0; padding-right: 20em; } } +#content #toc { border-style: solid; border-width: 1px; border-color: #d9d9d9; margin-bottom: 1.25em; padding: 1.25em; background: #f2f2f2; border-width: 0; -webkit-border-radius: 6px; border-radius: 6px; } +#content #toc > :first-child { margin-top: 0; } +#content #toc > :last-child { margin-bottom: 0; } +#content #toc a { text-decoration: none; } + +#content #toctitle { font-weight: bold; font-family: ff-meta-web-pro-1, ff-meta-web-pro-2, Arial, "Helvetica Neue", sans-serif; font-size: 1em; padding-left: 0.125em; } + +#footer { max-width: 100%; background-color: black; padding: 1.25em; } + +#footer-text { color: white; line-height: 1.35; } + +.sect1 { padding-bottom: 1.25em; } + +.sect1 + .sect1 { border-top: 1px solid #dddddd; } + +#content h1 > a.anchor, h2 > a.anchor, h3 > a.anchor, #toctitle > a.anchor, .sidebarblock > .content > .title > a.anchor, h4 > a.anchor, h5 > a.anchor, h6 > a.anchor { position: absolute; width: 1em; margin-left: -1em; display: block; text-decoration: none; visibility: hidden; text-align: center; font-weight: normal; } +#content h1 > a.anchor:before, h2 > a.anchor:before, h3 > a.anchor:before, #toctitle > a.anchor:before, .sidebarblock > .content > .title > a.anchor:before, h4 > a.anchor:before, h5 > a.anchor:before, h6 > a.anchor:before { content: '\00A7'; font-size: .85em; vertical-align: text-top; display: block; margin-top: 0.05em; } +#content h1:hover > a.anchor, #content h1 > a.anchor:hover, h2:hover > a.anchor, h2 > a.anchor:hover, h3:hover > a.anchor, #toctitle:hover > a.anchor, .sidebarblock > .content > .title:hover > a.anchor, h3 > a.anchor:hover, #toctitle > a.anchor:hover, .sidebarblock > .content > .title > a.anchor:hover, h4:hover > a.anchor, h4 > a.anchor:hover, h5:hover > a.anchor, h5 > a.anchor:hover, h6:hover > a.anchor, h6 > a.anchor:hover { visibility: visible; } +#content h1 > a.link, h2 > a.link, h3 > a.link, #toctitle > a.link, .sidebarblock > .content > .title > a.link, h4 > a.link, h5 > a.link, h6 > a.link { color: #465158; text-decoration: none; } +#content h1 > a.link:hover, h2 > a.link:hover, h3 > a.link:hover, #toctitle > a.link:hover, .sidebarblock > .content > .title > a.link:hover, h4 > a.link:hover, h5 > a.link:hover, h6 > a.link:hover { color: #3b444a; } + +.imageblock, .literalblock, .listingblock, .mathblock, .verseblock, .videoblock { margin-bottom: 1.25em; } + +.admonitionblock td.content > .title, .exampleblock > .title, .imageblock > .title, .listingblock > .title, .literalblock > .title, .mathblock > .title, .openblock > .title, .paragraph > .title, .quoteblock > .title, .sidebarblock > .title, .tableblock > .title, .verseblock > .title, .videoblock > .title, .dlist > .title, .olist > .title, .ulist > .title, .qlist > .title, .hdlist > .title { text-align: left; font-weight: bold; } + +.tableblock > caption { text-align: left; font-weight: bold; white-space: nowrap; overflow: visible; max-width: 0; } + +table.tableblock #preamble > .sectionbody > .paragraph:first-of-type p { font-size: inherit; } + +.admonitionblock > table { border: 0; background: none; width: 100%; } +.admonitionblock > table td.icon { text-align: center; width: 80px; } +.admonitionblock > table td.icon img { max-width: none; } +.admonitionblock > table td.icon .title { font-weight: bold; text-transform: uppercase; } +.admonitionblock > table td.content { padding-left: 1.125em; padding-right: 1.25em; border-left: 1px solid #dddddd; color: #909ea7; } +.admonitionblock > table td.content > :last-child > :last-child { margin-bottom: 0; } + +.exampleblock > .content { border-style: solid; border-width: 1px; border-color: #e6e6e6; margin-bottom: 1.25em; padding: 1.25em; background: white; -webkit-border-radius: 6px; border-radius: 6px; } +.exampleblock > .content > :first-child { margin-top: 0; } +.exampleblock > .content > :last-child { margin-bottom: 0; } +.exampleblock > .content h1, .exampleblock > .content h2, .exampleblock > .content h3, .exampleblock > .content #toctitle, .sidebarblock.exampleblock > .content > .title, .exampleblock > .content h4, .exampleblock > .content h5, .exampleblock > .content h6, .exampleblock > .content p { color: #333333; } +.exampleblock > .content h1, .exampleblock > .content h2, .exampleblock > .content h3, .exampleblock > .content #toctitle, .sidebarblock.exampleblock > .content > .title, .exampleblock > .content h4, .exampleblock > .content h5, .exampleblock > .content h6 { line-height: 1; 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.tabcontent-6{z-index:100;-ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";filter:alpha(opacity=100);opacity:1;width:100%;height:auto;width:100%;height:auto;padding-top:30px}.tabs .tab-selector-7:checked ~ .tabcontent .tabcontent-7{z-index:100;-ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";filter:alpha(opacity=100);opacity:1;width:100%;height:auto;width:100%;height:auto;padding-top:30px} + +.invisible {color: rgba(0,0,0,0); font-size: 0;} +</style> +<!-- +--> +<!-- Matomo --> +<script> + var _paq = window._paq = window._paq || []; + /* We explicitly disable cookie tracking to avoid privacy issues */ + _paq.push(['disableCookies']); + /* tracker methods like "setCustomDimension" should be called before "trackPageView" */ + _paq.push(['trackPageView']); + _paq.push(['enableLinkTracking']); + (function() { + var u="https://analytics.apache.org/";; + _paq.push(['setTrackerUrl', u+'matomo.php']); + _paq.push(['setSiteId', '27']); + var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0]; + g.async=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s); + })(); +</script> +<!-- End Matomo Code --> +</head> +<body class="book toc2 toc-left"> +<div id="header"> +<div id="toc" class="toc2"> +<div id="toctitle">Table of Contents</div> +<ul class="sectlevel0"> +<li><a href="#_tinkerpop_future">TinkerPop Future</a></li> +<li><a href="#roadmap">Roadmap</a> +<ul class="sectlevel1"> +<li><a href="#_tinkerpop_4_x">TinkerPop 4.x</a> +<ul class="sectlevel2"> +<li><a href="#_4_0_0_beta_1_release_2024q4">4.0.0-beta.1 Release (2024Q4)</a></li> +<li><a href="#_4_0_2025h1">4.0 (2025H1)</a></li> +<li><a href="#_4_14_x">4.1…​4.x</a></li> +</ul> +</li> +<li><a href="#_tinkerpop_5_x">TinkerPop 5.x</a></li> +</ul> +</li> +<li><a href="#_proposals">Proposals</a></li> +<li><a href="#_appendix">Appendix</a> +<ul class="sectlevel1"> +<li><a href="#_tinkerpop_4_x_feature_details">TinkerPop 4.x Feature Details</a> +<ul class="sectlevel3"> +<li><a href="#http-support">HTTP support - Server</a></li> +<li><a href="#http-support-glv">HTTP support - GLVs</a></li> +<li><a href="#io-updates">IO serialization updates</a></li> +<li><a href="#gremlin-lang-default">Switch default from <code>GremlinGroovyScriptEngine</code> to <code>GremlinLangScriptEngine</code></a></li> +<li><a href="#console-rework">Gremlin Console rework</a></li> +<li><a href="#tx-redesign">Transaction redesign</a></li> +<li><a href="#bytecode-removal">Bytecode removal</a></li> +<li><a href="#groovy-removal">Groovy removal in Gremlin Server</a></li> +<li><a href="#schema-support">Schema support</a></li> +<li><a href="#multi-label">Multi-label, no label, mutable label support</a></li> +<li><a href="#meta-props-on-edge">Multi/meta properties on edges</a></li> +<li><a href="#pluggable-explain">Pluggable System for explain/profile()</a></li> +<li><a href="#local-step-improve">Improve <code>local()</code> step</a></li> +<li><a href="#type-casts">Type conversion with <code>cast()</code> step</a></li> +<li><a href="#geo-vector-patterns">New Gremlin language elements for geospatial and vector computation</a></li> +<li><a href="#match-step-improve">Rework <code>match()</code> step</a></li> +<li><a href="#has-traversal"><code>has()</code> accepting Traversal</a></li> +<li><a href="#query-cancel">Query status/query cancellation</a></li> +<li><a href="#algorithm-steps">Unify algorithm steps</a></li> +<li><a href="#io-olap">Modernize IO for OLAP</a></li> +<li><a href="#neo4-removal">Remove <code>neo4j-gremlin</code></a></li> +<li><a href="#docs-reorg">Documentation reorganization</a></li> +<li><a href="#sparql-deprecate">Deprecate <code>sparql-gremlin</code></a></li> +<li><a href="#proxy">Proxy implementation</a></li> +<li><a href="#io-step-improve"><code>io()</code> step improvements</a></li> +<li><a href="#matrix-test">Matrix testing</a></li> +<li><a href="#telemerty">Improved telemetry in driver/server</a></li> +<li><a href="#type-system">Type System</a></li> +</ul> +</li> +</ul> +</li> +</ul> +</div> +</div> +<div id="content"> +<div id="preamble"> +<div class="sectionbody"> +<div class="imageblock"> +<div class="content"> +<a class="image" href="https://tinkerpop.apache.org";><img src="../../images/apache-tinkerpop-logo.png" alt="apache tinkerpop logo" width="500"></a> +</div> +</div> +<div class="paragraph"> +<p><strong>4.0.0-beta.1</strong></p> +</div> +</div> +</div> +<h1 id="_tinkerpop_future" class="sect0">TinkerPop Future</h1> +<div class="openblock partintro"> +<div class="content"> +<div class="paragraph"> +<p>This document offers a rough view at what features can be expected from future releases and catalogs proposals for +changes that might be better written and understood in a document form as opposed to a dev list post.</p> +</div> +<div class="paragraph"> +<p>This document is meant to change and restructure frequently and should serve more as a guide rather than directions set +in stone. As this document represents a future look, the current version is always on the <code>master</code> branch and therefore +the only one that need be maintained.</p> +</div> +</div> +</div> +<h1 id="roadmap" class="sect0">Roadmap</h1> +<div class="openblock partintro"> +<div class="content"> +<div class="paragraph"> +<p><span class="image left"><img src="../../images/gremlin-explorer-old-photo.png" alt="gremlin explorer old photo" width="250"></span>This section provides some expectations as to what features +might be provided in future <a href="https://tinkerpop.apache.org/docs/4.0.0-beta.1/dev/developer/#_versioning";>major versions</a>. It +is not a guarantee of a feature landing in a particular version, but it yields some sense of what core developers have +some focus on. The most up-to-date version of this document will always be in the +<a href="https://github.com/apache/tinkerpop/blob/master/docs/src/dev/future/index.asciidoc";>git repository</a>.</p> +</div> +<div class="paragraph"> +<p>The sub-sections that follow only outline those release lines that expect to include significant new features. Other +release lines may continue to be active with maintenance work and bug fixes, but won’t be listed here. The items listed +in each release line represent unreleased changes only. Once an official release is made for a line, the roadmap items +are removed with new items taking their place as they are planned. The release line is removed from the roadmap +completely when it is no longer maintained.</p> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_tinkerpop_4_x">TinkerPop 4.x</h2> +<div class="sectionbody"> +<div class="paragraph"> +<p>TinkerPop 4 marks the beginning of the move into semantic versioning, as discussed in the <a href="https://lists.apache.org/thread/g85tbsocmpv5oksq0xs425cgrw8xkdnn";>DISCUSS thread</a>. +Development has begun with the switch from WebSocket to HTTP/1.1 for the underlying transport of Gremlin Server, along +with many new features that have been proposed. Here is a rough outline of where new features are expected to land, with +major breaking features lined for 4.0, and additional features lined up for minor versions. +Additional details on each feature can be found in the Appendix.</p> +</div> +<div class="sect2"> +<h3 id="_4_0_0_beta_1_release_2024q4">4.0.0-beta.1 Release (2024Q4)</h3> +<div class="paragraph"> +<p>As discussed in the <a href="https://lists.apache.org/thread/hh58k28qy49lb9k7b9j4mnqvpxj0xf85";>DISCUSS thread</a>, we are looking +to release a beta build of what is done so far to gather feedback.</p> +</div> +<div class="paragraph"> +<p>This beta would roughly offer the opportunity to try Gremlin Server HTTP with the revised GraphSON and GraphBinary +serialization formats for TinkerPop 4.0, using Java and Python drivers. These drivers will initially continue to support +GraphSON as it can help with debugging (given its human-readable format) and offers wider serialization options for users +in these early days, we should expect to just have GraphBinary support for drivers in the future for simplicity.</p> +</div> +<div class="paragraph"> +<p>This beta release would include the following list of features for preview:</p> +</div> +<div class="ulist"> +<ul> +<li> +<p><a href="#http-support">HTTP support - Server</a></p> +<div class="ulist"> +<ul> +<li> +<p>Replacement of WebSocket with HTTP/1.1 (<a href="https://lists.apache.org/thread/vfs1j9ycb8voxwc00gdzfmlg2gghx3n1";>DISCUSS thread</a>)</p> +</li> +</ul> +</div> +</li> +<li> +<p><a href="#http-support-glv">HTTP support - GLVs</a> - Switching from WebSocket to HTTP in GLVs relies on community contribution in each language</p> +<div class="ulist"> +<ul> +<li> +<p><code>gremlin-java</code></p> +</li> +<li> +<p><code>gremlin-python</code></p> +</li> +</ul> +</div> +</li> +<li> +<p><a href="#io-updates">IO serialization updates</a> (<a href="https://lists.apache.org/thread/q7h5yzd2r064lv82njbmt6lmty4s24y7";>DISCUSS thread</a>)</p> +</li> +<li> +<p><a href="#bytecode-removal">Bytecode removal</a> (<a href="https://lists.apache.org/thread/7m3govzsqtmmj224xs7k5vv1ycnmocjn";>DISCUSS thread</a>)</p> +</li> +<li> +<p><a href="#console-rework">Gremlin Console rework</a></p> +</li> +</ul> +</div> +</div> +<div class="sect2"> +<h3 id="_4_0_2025h1">4.0 (2025H1)</h3> +<div class="paragraph"> +<p>Full GA release of TinkerPop 4.0.</p> +</div> +<div class="ulist"> +<ul> +<li> +<p><a href="#http-support">HTTP support - Server</a></p> +<div class="ulist"> +<ul> +<li> +<p>Replacement of WebSocket with HTTP/1.1 (<a href="https://lists.apache.org/thread/vfs1j9ycb8voxwc00gdzfmlg2gghx3n1";>DISCUSS thread</a>)</p> +</li> +</ul> +</div> +</li> +<li> +<p><a href="#http-support-glv">HTTP support - GLVs</a> - Switching from WebSocket to HTTP in GLVs relies on community contribution in each language</p> +<div class="ulist"> +<ul> +<li> +<p><code>gremlin-java</code></p> +</li> +<li> +<p><code>gremlin-python</code></p> +</li> +<li> +<p><code>gremlin-javascript</code></p> +</li> +<li> +<p><code>gremlin-dotnet</code></p> +</li> +<li> +<p><code>gremlin-go</code></p> +</li> +</ul> +</div> +</li> +<li> +<p><a href="#io-updates">IO serialization updates</a> (<a href="https://lists.apache.org/thread/q7h5yzd2r064lv82njbmt6lmty4s24y7";>DISCUSS thread</a>)</p> +</li> +<li> +<p><a href="#bytecode-removal">Bytecode removal</a> (<a href="https://lists.apache.org/thread/7m3govzsqtmmj224xs7k5vv1ycnmocjn";>DISCUSS thread</a>)</p> +</li> +<li> +<p><a href="#gremlin-lang-default">Switch default from <code>GremlinGroovyScriptEngine</code> to <code>GremlinLangScriptEngine</code></a></p> +</li> +<li> +<p><a href="#console-rework">Gremlin Console rework</a></p> +</li> +<li> +<p><a href="#multi-label">Multi-label, no label, mutable label support</a></p> +</li> +<li> +<p><a href="#tx-redesign">Transaction redesign</a> - API</p> +<div class="ulist"> +<ul> +<li> +<p>The design of the API with server/core implementations would be viable for the initial release</p> +</li> +<li> +<p>Adding support for these APIs in GLVs sets it up for the implementation in the next iteration</p> +</li> +</ul> +</div> +</li> +<li> +<p><a href="#neo4-removal">Remove <code>neo4j-gremlin</code></a></p> +</li> +<li> +<p><a href="#sparql-deprecate">Deprecate <code>sparql-gremlin</code></a></p> +</li> +</ul> +</div> +</div> +<div class="sect2"> +<h3 id="_4_14_x">4.1…​4.x</h3> +<div class="ulist"> +<ul> +<li> +<p><a href="#tx-redesign">Transaction redesign</a> - Implementation</p> +<div class="ulist"> +<ul> +<li> +<p>Full API implementation in TinkerGraph</p> +</li> +</ul> +</div> +</li> +<li> +<p><a href="#io-step-improve"><code>io()</code> step improvements</a></p> +</li> +<li> +<p><a href="#proxy">Proxy implementation</a></p> +</li> +<li> +<p><a href="#geo-vector-patterns">New Gremlin language elements for geospatial and vector computation</a></p> +</li> +<li> +<p><a href="#local-step-improve">Improve <code>local()</code> step</a></p> +</li> +<li> +<p><a href="#type-casts">Type conversion with <code>cast()</code> step</a></p> +</li> +<li> +<p><a href="#match-step-improve">Rework <code>match()</code> step</a></p> +</li> +<li> +<p><a href="#has-traversal"><code>has()</code> accepting Traversal</a></p> +</li> +<li> +<p><a href="#algorithm-steps">Unify algorithm steps</a></p> +</li> +<li> +<p><a href="#matrix-test">Matrix testing</a></p> +</li> +<li> +<p><a href="#query-cancel">Query status/query cancellation</a></p> +</li> +</ul> +</div> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_tinkerpop_5_x">TinkerPop 5.x</h2> +<div class="sectionbody"> +<div class="ulist"> +<ul> +<li> +<p><a href="#groovy-removal">Groovy removal in Gremlin Server</a></p> +</li> +<li> +<p><a href="#type-system">Type System</a></p> +</li> +<li> +<p><a href="#schema-support">Schema support</a></p> +</li> +<li> +<p><a href="#pluggable-explain">Pluggable System for explain/profile()</a></p> +</li> +<li> +<p><a href="#io-olap">Modernize IO for OLAP</a></p> +</li> +<li> +<p><a href="#docs-reorg">Documentation reorganization</a></p> +</li> +<li> +<p><a href="#telemerty">Improved telemetry in driver/server</a></p> +</li> +<li> +<p><a href="#meta-props-on-edge">Multi/meta properties on edges</a></p> +</li> +</ul> +</div> +<hr> +<div class="paragraph"> +<p><strong>Features originally planned for 3.7.x.</strong></p> +</div> +<div class="ulist"> +<ul> +<li> +<p>Add support for traversals as parameters for <code>V()</code>, <code>is()</code>, and <code>has()</code> (includes <code>Traversal</code> arguments to <code>P</code>)</p> +</li> +<li> +<p>Add subgraph/tree structure in all GLVs</p> +</li> +<li> +<p>Define semantics for query federation across Gremlin servers (depends on <code>call()</code> step)</p> +</li> +<li> +<p>Gremlin debug support</p> +</li> +<li> +<p>Case-insensitive search (<a href="https://issues.apache.org/jira/browse/TINKERPOP-2673";>TINKERPOP-2673</a>)</p> +</li> +<li> +<p>Mutation steps for <code>clone()</code> of an <code>Element</code> and for <code>moveE()</code> for edges.</p> +</li> +<li> +<p>Add a language element to merge <code>Map</code> objects more easily.</p> +</li> +</ul> +</div> +</div> +</div> +<h1 id="_proposals" class="sect0">Proposals</h1> +<div class="openblock partintro"> +<div class="content"> +<div class="paragraph"> +<p>This section tracks and details future ideas. While the dev list is the primary place to talk about new ideas, complex +topics can be initiated from and/or promoted to this space. While it is fine to include smaller bits of content directly +in <code>future/index.asciidoc</code>, longer, more developed proposals and ideas would be better added as individual asciidoc +files which would then be included as links to the GitHub repository where they will be viewable in a formatted state. +In this way, this section is more just a list of links to proposals rather than an expansion of text. Proposals should +be named according to this pattern "proposal-<name>-<number>" where the "name" is just a logical title to help identify +the proposal and the "number" is the incremented proposal count.</p> +</div> +<div class="paragraph"> +<p>The general structure of a proposal is fairly open but should include an initial "Status" section which would describe +the current state of the proposal. A new proposal would likely hae a status like "Open for discussion". From there, +the proposal should include something about the "motivation" for the change which describes a bit about what the issue +is and why a change is needed. Finally, it should explain the details of the change itself.</p> +</div> +<div class="paragraph"> +<p>At this stage, the proposal can then be submitted as a pull request for comment. As part of that pull request, the +proposal should be added to the table below. Proposals always target the <code>master</code> branch.</p> +</div> +<div class="paragraph"> +<p>The table below lists various proposals and their disposition. The <strong>Targets</strong> column identifies the release or releases +to which the proposal applies and the <strong>Resolved</strong> column helps clarify the state of the proposal itself. Generally +speaking, the proposal is "resolved" when the core tenants of its contents are established. For some proposals that +might mean "fully implemented", but it might also mean "scheduled and scoped with open issues set aside". In that sense, +the meaning is somewhat subjective. Consulting the "Status" section of the proposal itself will provide the complete +story.</p> +</div> +<table class="tableblock frame-all grid-all stretch"> +<colgroup> +<col style="width: 18.75%;"> +<col style="width: 62.5%;"> +<col style="width: 12.5%;"> +<col style="width: 6.25%;"> +</colgroup> +<thead> +<tr> +<th class="tableblock halign-left valign-top">Proposal</th> +<th class="tableblock halign-left valign-top">Description</th> +<th class="tableblock halign-left valign-top">Targets</th> +<th class="tableblock halign-center valign-top">Resolved</th> +</tr> +</thead> +<tbody> +<tr> +<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="https://github.com/apache/tinkerpop/blob/master/docs/src/dev/future/proposal-equality-1.asciidoc";>Proposal 1</a></p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">Equality, Equivalence, Comparability and Orderability Semantics - Documents existing Gremlin semantics along with clarifications for ambiguous behaviors and recommendations for consistency.</p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">3.6.0</p></td> +<td class="tableblock halign-center valign-top"><p class="tableblock">Y</p></td> +</tr> +<tr> +<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="https://github.com/apache/tinkerpop/blob/master/docs/src/dev/future/proposal-arrow-flight-2";>Proposal 2</a></p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">Gremlin Arrow Flight.</p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">Future</p></td> +<td class="tableblock halign-center valign-top"><p class="tableblock">N</p></td> +</tr> +<tr> +<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="https://github.com/apache/tinkerpop/blob/master/docs/src/dev/future/proposal-3-remove-closures";>Proposal 3</a></p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">Removing the Need for Closures/Lambda in Gremlin</p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">3.7.0</p></td> +<td class="tableblock halign-center valign-top"><p class="tableblock">Y</p></td> +</tr> +<tr> +<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="https://github.com/apache/tinkerpop/blob/master/docs/src/dev/future/proposal-transaction-4";>Proposal 4</a></p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">TinkerGraph Transaction Support</p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">3.7.0</p></td> +<td class="tableblock halign-center valign-top"><p class="tableblock">Y</p></td> +</tr> +</tbody> +</table> +</div> +</div> +<h1 id="_appendix" class="sect0">Appendix</h1> +<div class="sect1"> +<h2 id="_tinkerpop_4_x_feature_details">TinkerPop 4.x Feature Details</h2> +<div class="sectionbody"> +<div class="sect3"> +<h4 id="http-support">HTTP support - Server</h4> +<div class="paragraph"> +<p>Currently under development in the <code>master-http</code> branch. This body of work aims to replace the WebSocket protocol in Gremlin Server +with HTTP/1.1 (<a href="https://lists.apache.org/thread/vfs1j9ycb8voxwc00gdzfmlg2gghx3n1";>DISCUSS thread</a>). +For API design, see <a href="https://issues.apache.org/jira/browse/TINKERPOP-3065";>TINKERPOP-3065 +Implement a new HTTP API</a>.</p> +</div> +</div> +<div class="sect3"> +<h4 id="http-support-glv">HTTP support - GLVs</h4> +<div class="paragraph"> +<p>As server will no longer support WebSocket, each GLVs will also switch to HTTP protocol. Connection +options should be simplified with HTTP compared to WebSocket, and should be unified across all GLVs to the best of each +language’s library availability. This will also include implementing interface for pluggable request interceptor for authentication, +as raised in the <a href="https://lists.apache.org/thread/cpsdd7gjmr1yb6c5kkm6v2bcfpp6fqq5";>DISCUSS thread</a>.</p> +</div> +</div> +<div class="sect3"> +<h4 id="io-updates">IO serialization updates</h4> +<div class="paragraph"> +<p>TinkerPop’s serialization IO has not been updated for quite a long time, there are serializers that can and should likely be +removed, and definition updated to make the IO overall more simple and maintainable. (<a href="https://lists.apache.org/thread/q7h5yzd2r064lv82njbmt6lmty4s24y7";>DISCUSS thread</a>)</p> +</div> +</div> +<div class="sect3"> +<h4 id="gremlin-lang-default">Switch default from <code>GremlinGroovyScriptEngine</code> to <code>GremlinLangScriptEngine</code></h4> +<div class="paragraph"> +<p>Switching the default script processing from <code>GremlinGroovyScriptEngine</code> to <code>GremlinLangScriptEngine</code> is a step towards removing +dependency on Groovy in the Gremlin Server. Currently, the TinkerPop testing system make heavy use of the Groovy script engine, and +a major portion of the work will involve updating the tests.</p> +</div> +</div> +<div class="sect3"> +<h4 id="console-rework">Gremlin Console rework</h4> +<div class="paragraph"> +<p>As a result of sessions removal and switch to <code>gremlin-lang</code>, the Gremlin Console remote mode will be affected, and users +may notice a difference in the interactive experience on the Console. Additional discussions may be needed on the impact and acceptable changes. +(<a href="https://lists.apache.org/thread/rd70smb8jntws1kvz19pyxz23qdgtc2o";>DISCUSS thread</a>)</p> +</div> +</div> +<div class="sect3"> +<h4 id="tx-redesign">Transaction redesign</h4> +<div class="paragraph"> +<p>As transaction will have to be implemented over HTTP, this is an opportunity to improve the usability of the transaction APIs. +This potentially mean redesigning the transaction model so that it is better suited for all graphs, align remote and embedded +transaction usages, and ensure transaction support in GLVs. +Such API redesign will be a breaking change that needs to be introduced in the initial release of TP4, which can include +stub implementations only, with full implementation added iteratively in minor releases.</p> +</div> +</div> +<div class="sect3"> +<h4 id="bytecode-removal">Bytecode removal</h4> +<div class="paragraph"> +<p>One of the purposes that bytecode served was to provide a universal way to translate a Traversal. However, with the introduction of +the <code>gremlin-lang</code> parser this need can be fulfilled differently. Any Gremlin script can be converted into a Traversal in a uniform way which reduces the +need for bytecode. Now, we are left with two systems that serve a similar purpose, it is probably time to remove one of them during a major +version upgrade, see (<a href="https://lists.apache.org/thread/7m3govzsqtmmj224xs7k5vv1ycnmocjn";>DISCUSS thread</a>).</p> +</div> +<div class="paragraph"> +<p>Before the full removal can be implemented, a few updates will be needed in <code>gremlin-lang</code> to ensure appropriate types are covered. +Each GLV will also have to be updated to switch from bytecode based to string based traversal construction. A proposed plan includes:</p> +</div> +<div class="olist arabic"> +<ol class="arabic"> +<li> +<p>Extract interface from Bytecode, and implement string based traversals and request options</p> +</li> +<li> +<p>Add support for missing types, such as UUID, Set, Edge, ByteBuffer, etc. in <code>gremlin-lang</code> (<a href="https://issues.apache.org/jira/browse/TINKERPOP-3023";>TINKERPOP-3023</a>)</p> +</li> +<li> +<p>Add missing types to GLVs and rework traversal generation</p> +</li> +<li> +<p>Ensure Feature tests work properly</p> +</li> +</ol> +</div> +<div class="paragraph"> +<p><strong>I/O serialization update needed</strong></p> +</div> +<div class="paragraph"> +<p>One important note for this proposed plan is that currently <code>gremlin-lang</code> does not cover all types supported via Bytecode, +which means either <em>all missing types need to be fully defined and implemented in the <code>gremlin-lang</code> parser for parity +(related to <a href="#type-system">Type System</a>)</em>, or <em>consensus have to be reached in the community on if reduced type support +is acceptable, and if so, which types can be omitted at this point.</em></p> +</div> +</div> +<div class="sect3"> +<h4 id="groovy-removal">Groovy removal in Gremlin Server</h4> +<div class="paragraph"> +<p>Removing Groovy from Gremlin Server implies:</p> +</div> +<div class="olist arabic"> +<ol class="arabic"> +<li> +<p>Revising the configuration system to avoid the init script through Groovy. This is also an opportunity to simply server set-up.</p> +</li> +<li> +<p>Deprecate <code>GremlinGroovyScriptEngine</code> for <code>GremlinLangScriptEngine</code> for script processing</p> +</li> +<li> +<p>Remove/replace all the Groovy based plugin infrastructure from the server</p> +</li> +</ol> +</div> +<div class="paragraph"> +<p>One main impact of how Groovy allows arbitrary code to be executed on the server is security vulnerabilities. +However, the removal of this system itself has overreaching affects in the community that should be discussed.</p> +</div> +</div> +<div class="sect3"> +<h4 id="schema-support">Schema support</h4> +<div class="paragraph"> +<p>Schema support relies on a well-defined type system.</p> +</div> +</div> +<div class="sect3"> +<h4 id="multi-label">Multi-label, no label, mutable label support</h4> +<div class="paragraph"> +<p>TinkerPop only support single, immutable labels for its Elements. Various providers have implemented their own mechanisms +for multi-label, no label, and/or mutable label support. Many popular non-TinkerPop graph models also allow for multiple labels. It is time to consider +bringing these functionalities into parity.</p> +</div> +</div> +<div class="sect3"> +<h4 id="meta-props-on-edge">Multi/meta properties on edges</h4> +<div class="paragraph"> +<p>Currently, meta-properties only exists on vertices, this extends to allowing meta-properties on edges.</p> +</div> +</div> +<div class="sect3"> +<h4 id="pluggable-explain">Pluggable System for explain/profile()</h4> +<div class="paragraph"> +<p>While TinkerPop provides explain() and profile() steps, switching to a pluggable architecture would increase flexibility for +providers who wish to customize the amount and format of information they return. (<a href="https://lists.apache.org/thread/y8zbyx1jm5whbsw5kmo5vp58l8z815qc";>DISCUSS Thread</a>)</p> +</div> +<div class="paragraph"> +<p>An extension of this is for explain() to work in remote fashion, see <a href="https://issues.apache.org/jira/browse/TINKERPOP-2128";>TINKERPOP-2128</a></p> +</div> +</div> +<div class="sect3"> +<h4 id="local-step-improve">Improve <code>local()</code> step</h4> +<div class="paragraph"> +<p>The concept and application of the <code>local()</code> step has been somewhat confusing to users, and the addition of the string and list +manipulation steps in 3.7 further blurred some definitions of local execution in a traversal. It is a good time to start considering +a redesign or improved design of the <code>local()</code> step.</p> +</div> +</div> +<div class="sect3"> +<h4 id="type-casts">Type conversion with <code>cast()</code> step</h4> +<div class="paragraph"> +<p>We have introduced <code>asString()</code> and <code>asDate()</code> in 3.7, this would be to introduce additional casting steps like <code>toInt()</code>, which +should rely on a well-defined type system.</p> +</div> +</div> +<div class="sect3"> +<h4 id="geo-vector-patterns">New Gremlin language elements for geospatial and vector computation</h4> +<div class="paragraph"> +<p>Similar to how string and list manipulation steps were introduced, there is room for creating first-class steps for vector computation +and geospatial steps (<a href="https://lists.apache.org/thread/mxg3kopgj9h9v8j299qjhdhopzpdkfow";>DISCUSS Thread</a>).</p> +</div> +</div> +<div class="sect3"> +<h4 id="match-step-improve">Rework <code>match()</code> step</h4> +<div class="paragraph"> +<p>The <code>match()</code> step has been an attempt to introduce a way of declarative form of querying in TinkerPop based on pattern matching. +There exists various issues with the step, and rework is due for improvements.</p> +</div> +<div class="paragraph"> +<p>Unresolved issues related to current <code>match()</code>:</p> +</div> +<div class="ulist"> +<ul> +<li> +<p><a href="https://issues.apache.org/jira/browse/TINKERPOP-2961";>TINKERPOP-2961 Missing exceptions for unsolvable match pattern</a></p> +</li> +<li> +<p><a href="https://issues.apache.org/jira/browse/TINKERPOP-2528";>TINKERPOP-2528 Improve match() step to generate traversals that uses indexes</a></p> +</li> +<li> +<p><a href="https://issues.apache.org/jira/browse/TINKERPOP-2503";>TINKERPOP-2503 Implement look-ahead on PathRetractionStrategy</a></p> +</li> +<li> +<p><a href="https://issues.apache.org/jira/browse/TINKERPOP-2340";>TINKERPOP-2340 MatchStep with VertexStep Exceptions</a></p> +</li> +<li> +<p><a href="https://issues.apache.org/jira/browse/TINKERPOP-940";>TINKERPOP-940 Convert LocalTraversals to MatchSteps in OLAP</a></p> +</li> +<li> +<p><a href="https://issues.apache.org/jira/browse/TINKERPOP-736";>TINKERPOP-736 Automatic Traversal rewriting</a></p> +</li> +</ul> +</div> +</div> +<div class="sect3"> +<h4 id="has-traversal"><code>has()</code> accepting Traversal</h4> +<div class="paragraph"> +<p>This is a body of work that was in the roadmap for 3.7.x, which is to add support of traversals as parameters to <code>has()</code>, +which should expand the usability of the Gremlin language.</p> +</div> +</div> +<div class="sect3"> +<h4 id="query-cancel">Query status/query cancellation</h4> +<div class="paragraph"> +<p>These are useful features for debugging and improved resource management that have been implemented by providers, but would now be +a good time to bring parity into TinkerPop.</p> +</div> +<div class="paragraph"> +<p>Related issue: <a href="https://issues.apache.org/jira/browse/TINKERPOP-2210";>TINKERPOP-2210 Support cancellation of remote traversals</a>.</p> +</div> +</div> +<div class="sect3"> +<h4 id="algorithm-steps">Unify algorithm steps</h4> +<div class="paragraph"> +<p>Moving the algorithm steps into <code>call()</code> step or generify them in some way.</p> +</div> +</div> +<div class="sect3"> +<h4 id="io-olap">Modernize IO for OLAP</h4> +<div class="paragraph"> +<p>As name suggests, we should remove old file serialization formats, and introduce more modernized format for IO. One possible +candidate is <a href="https://github.com/apache/incubator-graphar";>GraphAR</a>, which is a standard data file format for graph data +storage and retrieval, currently an incubating Apache project.</p> +</div> +<div class="paragraph"> +<p>A potential large extension of this work, which may not be included for this version yet, is revisiting OLAP in general to resolve +<a href="https://issues.apache.org/jira/browse/TINKERPOP-1298?jql=project%20%3D%20TINKERPOP%20AND%20status%20%3D%20Open%20AND%20text%20~%20%22OLAP%22";>open JIRA issues</a>.</p> +</div> +</div> +<div class="sect3"> +<h4 id="neo4-removal">Remove <code>neo4j-gremlin</code></h4> +<div class="paragraph"> +<p>As discussed inside (<a href="https://lists.apache.org/thread/lxn4s9fs8rzggm0jlnffnphfpqnpn3h8";>DISCUSS thread</a>), <code>neo4j-gremlin</code> was deprecated in 3.7 +with the introduction of native transaction in TinkerGraph. TP4 would be the place to remove the module.</p> +</div> +</div> +<div class="sect3"> +<h4 id="docs-reorg">Documentation reorganization</h4> +<div class="paragraph"> +<p>In addition to the necessary documentation updates needed for new TP4 feature implementations, this entails more major rework +to the documentation structure.</p> +</div> +<div class="paragraph"> +<p>The current documentation is very thorough in certain areas, but lacking in many others. The accumulation of the features and functionalities +over the past years likely mean that certain information are outdated, and/or should be reworded for clarity. While we have a generous +amount of reference material, there tend to lack implementation guidelines for contributors and providers. TP4 is an opportunity to rework +the documentations to be more thorough, concise, clear, and easy to update when new features are implemented.</p> +</div> +<div class="paragraph"> +<p>Another implication of this is to revisit the current documentation generation process. We have a very complex scripting structure that we use to +orchestrate the generation of documentations, combined with Maven plugins for language specific docs. This process maybe affected by +any major alterations to documentation structure, which would need some effort to revise.</p> +</div> +</div> +<div class="sect3"> +<h4 id="sparql-deprecate">Deprecate <code>sparql-gremlin</code></h4> +<div class="paragraph"> +<p>This module of TinkerPop has been largely unmaintained and likely unused for many years. Unless we receive fresh interest and contribution, +it would be the time to deprecate and remove in a future version.</p> +</div> +</div> +<div class="sect3"> +<h4 id="proxy">Proxy implementation</h4> +<div class="paragraph"> +<p>Implementing a proxy for Gremlin Server might be a viable alternative to implementing clustering in the client, for +orchestrating multiple Gremlin Server instances, and/or rerouting WebSocket/HTTP requests for compatibility.</p> +</div> +</div> +<div class="sect3"> +<h4 id="io-step-improve"><code>io()</code> step improvements</h4> +<div class="paragraph"> +<p>Simply <code>io()</code> for data ingestion and export in both embedded and remote usage in some way, and add support for CSV format.</p> +</div> +</div> +<div class="sect3"> +<h4 id="matrix-test">Matrix testing</h4> +<div class="paragraph"> +<p>This aims to create an automated testing set up, which helps to ensure compatibility between drivers and server across minor releases, +and to make sure API contracts are not broken unintentionally.</p> +</div> +</div> +<div class="sect3"> +<h4 id="telemerty">Improved telemetry in driver/server</h4> +<div class="paragraph"> +<p>This is a less well-defined area, aimed at improved metrics collection that can better aid debugging for users and providers. +Work may include adding the ability to debug queries and traversals, adding OpenTelemetry support, etc.</p> +</div> +</div> +<div class="sect3"> +<h4 id="type-system">Type System</h4> +<div class="paragraph"> +<p>TinkerPop has not had one’s own type system defined and has been relying on the JVM types, which becomes a problem especially in +GLVs that doesn’t have corresponding types defined in their language. (<a href="https://lists.apache.org/thread/rpdq3ywk6vqpyv512to36ot8yqvjo3dv";>DISCUSS thread</a>)</p> +</div> +</div> +</div> +</div> +</div> +<div id="footer"> +<div id="footer-text"> +Last updated 2025-01-17 14:43:29 -0800 +</div> +</div> +</body> +</html>
