W3C Architecture Domain Member Site: Confidential! XML Activity

EXI Status - September 2008

The Last Call Working Draft of the format specification was made available for review. Also earlier in the same month, a draft note on EXI Impacts describing the impacts of EXI that may potentially cause to affect existing XML technologies, XML processors, and applications.

EXI Status - July 2008

The 4th and complete Working Draft of the format specification is available for review. A draft note on the Evaluation of the EXI Format with reference to the Properties identified by the XBC Working Group, relative to XML, gzipped XML and ASN.1 PER, is published.

EXI Status - March 2008

The 3rd Working Draft of the format specification has been published (see also: list of changes from the previous draft).

EXI Status - December 2007

The 2nd Working Draft of the format specification has been published (see also: list of changes from the previous draft), as well as two additional documents: a Primer and a Best Practices document.

EXI Status - July 2007

The two previously separate documents, the Measurements Note (Working Draft), and the Analysis Note (publicly available), have been republished as a single Working Draft on July 25th. Additionally, all of the raw measurement data are available.

EXI Status - April 2007

The First Public Working Draft of the EXI specification was originally expected in February 2007 (immediately after the W3C multi-group meeting, at which we consulted with other Working Groups). This has been delayed while we have integrated features for efficient structural and value encodings, schema mapping, support for specialized codecs, and compression. A revised estimate for First Public Working Draft is early May 2007. At that time the two presently published documents, the Measurements Note, and the Analysis Note, which are now in Draft status, will also be republished as a single work. Additionally, all of the raw measurement data will be made available.

EXI Status - November 2006

As of mid November 2006, the EXI group has completed measurements of various candidate encodings and processors for an efficient XML interchange. Based on the results of that work the group has selected Efficient XML to be the basis for the proposed encoding specification. Present work centers around integrating some features from the other measured format technologies into Efficient XML, particularly variations for both more efficient structural and value encodings. Additionally, we are drafting the specification of this format, making some further measurements of the format in a small variety of network exchanges, and preparing a final release of the full measurements data and accompanying analysis.

A first public working draft of the proposed EXI format specification is expected shortly after consultation with other W3C working groups at the "mini-multi-group" meeting at W3C's MIT office in January 2007.

EXI Status — 15 March 2006

Efficient XML Interchange WG (charter) began its work with an open Call for Contributions. Several proposals have been received so far, alongside their self-assessments against the requirements set forth in the XML Binary Characterization Note.

Currently the working group is examining the proposals and their self-assessments. We are also developing a measurement framework and test suite for compactness and processing efficiency based on the XBC Use Case Note and the XBC Measurement Methodology Note. The first public draft describing the measurement framework and early results will be published as a Note in May 2006.

Submitted proposals under evaluation

Other submissions

Since a proposal is required to have an implementation in order to be evaluated in the first pass, some submissions may not be able to be evaluated as part of our early work, though they may prove to constitute useful input in later stages.

Greg White, Co-Chair
Daniel Vogelheim, Co-Chair
Carine Bournez, W3C Team contact
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