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Subject: Public Review of XRI V2.0

 To: OASIS members, public announce lists

The OASIS Extensible Resource Identifier (XRI) TC has recently approved the following specifications as Committee Drafts and
approved them for public review:
XRI Syntax V2.0
XRI Resolution V2.0
XRI Metadata V2.0
The public review starts today, 15 March 2005 and ends 14 April 2005.

Public review from potential users, developers and stakeholders is an important part of the OASIS process to assure interoperability
and quality. Comments are solicited from all interested parties. Please feel free to forward this message to other appropriate lists
and/or post this information on your organization's web site. Comments may be submitted to the TC by any person via a web form found
on the TC's web page at http://www.oasis-open.org/committees/xri. Click the button for "Send A Comment" at the top of the page.

Submitted comments (for this work as well as other works of that TC) are publicly archived and can be viewed at
A summary and the file locations follow below. 

Mary P McRae
Manager of TC Administration, OASIS


The XRI V2.0 suite of specifications define a syntax and resolution protocol for abstract identifiers -- identifiers that are
independent of a specific location, domain, application, or protocol. The XRI specifications build directly on the foundation
provided by the URI (Uniform Resource Identifier) and IRI (Internationalized Resource Identifier) specifications (RFC 3986 and
3987). Unlike URNs (Uniform Resource Names, RFC 2141), XRIs support both persistent and reassignable abstract identifiers. In
addition they offer several other features required for a uniform abstract identification layer, including unlimited federation,
cross-references, and global context symbols.


The file are available here:

1. XRI Syntax V2.0 Committee Draft 01 defines the normative ABNF grammar for XRIs, transformations from XRIs into IRIs and URIs,
relative XRI references, and normalization/comparison. It is available at:

2. XRI Resolution V2.0 Committee Draft 01 defines an HTTP/HTTPS-based resolution protocol for XRIs, including both generic and
trusted resolution.
The latter uses SAML assertions based on the new SAML 2.0 specifications. It is available at:

3. XRI Metadata V2.0 Committee Draft 01 defines four namespaces under the XRI global context symbol "$" for common types of
identifier metadata, including language tags, date/time stamps, version identifiers, and annotations. It is available at:

4. Introduction to XRIs Working Draft 04 is a non-normative introduction to the uses and features of XRIs. This work-in-progress is
intended to serve as an entry point for the XRI 2.0 suite. The XRI TC encourages feedback and input on this document from other
OASIS members. It is available at:

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