tuxji commented on code in PR #90: URL: https://github.com/apache/daffodil-site/pull/90#discussion_r1020806126
########## site/extensions.adoc: ########## @@ -0,0 +1,60 @@ +:page-layout: page +:url-asciidoctor: http://asciidoctor.org +:keywords: plugins layering UDF charset +// /////////////////////////////////////////////////////////////////////////// +// +// This file is written in AsciiDoc. +// +// If you can read this comment, your browser is not rendering asciidoc automatically. +// +// You need to install the asciidoc plugin to Chrome or Firefox +// so that this page will be properly rendered for your viewing pleasure. +// +// You can get the plugins by searching the web for 'asciidoc plugin' +// +// You will want to change plugin settings to enable diagrams (they're off by default.) +// +// You need to view this page with Chrome or Firefox. +// +// /////////////////////////////////////////////////////////////////////////// +// +// When editing, please start each sentence on a new line. +// See https://asciidoctor.org/docs/asciidoc-recommended-practices/#one-sentence-per-line[one sentence-per-line writing technique.] +// This makes textual diffs of this file useful in a similar way to the way they work for code. +// +// ////////////////////////////////////////////////////////////////////////// + += DFDL Language Extensions in Daffodil + +Daffodil contains numerous extensions to the DFDL v1.0 language. + +Many of these have been, or will be proposed for inclusion in a future version of the DFDL standard. + +This page provides a central starting point for the documentation of these extension features. + +== About Daffodil Plugins + +To provide some new advanced format capabilities such as checksums, compressed or encoded data regions, and user-defined-functions, DFDL schemas sometimes must use Daffodil-specific extensions and incorporate Daffodil plugins that provide the small algorithmic aspects needed by these formats. + +There are 2 kinds of plugins today supported by Daffodil 3.3.0 + +- Layering Transformer (e.g., unzip/zip, verify/recompute checksums) +- User Defined Function (UDF) (e.g., convert mean-sea-level elevation to height-above-ellipsoid) + +There is one additional kind of plugin that will be supported by Daffodil 3.4.0 Review Comment: Daffodil 3.4,0 has been released so you can update this PR accordingly. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
