On Mon, Mar 19, 2012 at 1:47 PM, XMPP Extensions Editor <[email protected]>wrote:
> Version 0.2 of XEP-0301 (In-Band Real Time Text) has been released. > Abstract: This is a specification for real-time text transmitted in-band > over an XMPP session. > Changelog: Lots of edits. Simplifications, improvements and corrections. > Forward and backward compatible with version 0.1. (MDR) > > Diff: http://xmpp.org/extensions/diff/api/xep/0301/diff/0.1/vs/0.2 > URL: http://xmpp.org/extensions/xep-0301.html > ChangeLog Summary: Versus Previous Spec - Spec is approximately the same size. - Remains forward and backward compatible with v0.1 - Protocol is simplified and easier to read (5 fewer sections) - Implementation Notes is expanded (add some new sections) Noteworthy Protocol Level Changes - Eliminate <g> element (use XEP-0224 instead to do same thing). No compatibility impact. - Eliminate <c> element (use empty <t> instead, does the same thing). No compatibility impact. - Eliminate <rtt event='start'> (the first <rtt> of any kind can signal start). No compatibility impact. - Simplify: <rtt event='cancel'> (tells the remote end to stop sending <rtt>). No compatibility impact. - Simplify: Tier 1 and Tier 2 is merged into a single tier - Clarify: Redundancy methods is clearly outlined (based on my work with Next Generation 9-1-1 texting) - Change: "RECOMMENDED" transmission interval is now 0.7s. Range can be 0.3ms to 1s. (0.7s complies with ITU-T Rec. F.700 end-to-end, including network latency). (NOTE: 0.7s is only a very slight increase in bandwidth, still a *lot* less than XEP-0047 in-band bytestreams.) Other Changes - Many minor grammar corrections made throughout - Many improved wording throughout - Many removals of redundant info throughout - Error in Example 7.9 fixed, fix error in section 4.5.1.1 - Introduction and Requirements overhauled. - Requirements also now mention an important "Accessibility" section - Implementation Notes has been significantly expanded with new information and sections. - Add "Multi-User Chat", "Simultaneous Logins", "Usage with Chat States", and several other sections - Eliminated "Processing Rules" because it contained redundant info elsewhere in the spec. I carefully embedded remaining parts elsewhere. - Sections "Ensuring Accuracy Of Attribute Values" and "Unicode Character Counting" - I removed all words "cursor" (except within "Optional Remote Cursor" and in examples). This makes the spec less daunting. - Merged "Battery Life" and "Performance" into "Performance & Efficiency" - Shortened and improved "Body Element" section - Permit auto-send of long messages to "Message Length Limit", which is useful for uninterrupted typing if RTT is enabled. - Additional methods of text presentation optimized for live captioning/transcription/relay services for the deaf. - Add "Lower Precision Text-Smoothing Methods", useful for performance/battery/precision constrained situations - Add "Time Critical And Low Latency Methods", useful for live captioning/transcription services - Next Generation 9-1-1 is now mentioned in Requirements. It is noteworthy that XEP-0301 is currently being tested in a Next Generation 9-1-1 demonstration program (text mesaging to phone number 911 for emergency), that is one of the programs being shown in front of FCC text-to-911 demonstration during March 28-29, at: http://www.fcc.gov/events/eaac-exhibition-fair-%E2%80%9Ctext-9-1-1%E2%80%9D-mobile-solutions Thanks, Mark Rejhon
