Browse by Tags

• Addressing
• Indigo

• Policy Primer Finalized

  After six weeks of comments and editing the primer on WS-Policy 1.5 that I mentioned earlier has been published by the working group. The primer is an explanation of how to use policy with web services along with best practice guidelines for policy authors. These are published as two separate documents on the W3C web site: Web Services Policy 1.5 - Primer Web Services Policy 1.5 - Guidelines for Policy Assertion Authors I'd recommend reading these if you are writing policy expressions by hand, writing software that deals with policy expressions, or defining your own policy assertions for other people to use. Read More... Posted Wednesday, November 14, 2007 8:00 AM from Nicholas Allen's Indigo Blog | 1 Comments Filed under: Indigo, Announcements, Contracts

• Help for Policy Authors

  The W3C Web Services Policy Working Group is putting together a pair of documents to help policy users and authors with the new version of WS-Policy. This includes an explanation of how policy works and best practices for policy authors. There's currently a three week period for collecting comments, which runs through October 19th. You can get both of these documents from the W3C web site: Web Services Policy 1.5 - Primer Web Services Policy 1.5 - Guidelines for Policy Assertion Authors Copies of the standard itself are linked from the earlier announcement I made . Read More... Posted Monday, October 01, 2007 8:00 AM from Nicholas Allen's Indigo Blog | 1 Comments Filed under: Indigo, Announcements, Contracts

• WS-Addressing Metadata and WS-Policy Completed

  Two new standards were published yesterday by W3C that cover various aspects of web service metadata. WS-Policy is one of the family of general mechanisms used to describe service requirements and capabilities. Policy attachments supplement the general mechanism to describe how policy is specifically tied to a service description language, such as WSDL. Finally, WS-Addressing Metadata explains how addressing concepts should appear in WSDL, how WSDL should appear in addresses, and how addressing is described through policy. Look for these standards to be supported in the upcoming Orcas release. You can get all of these specifications at the W3C site. Web Services Addressing 1.0 - Metadata Web Services Policy 1.5 - Framework Web Services Policy 1.5 - Attachment Read More... Posted Wednesday, September 05, 2007 8:00 AM from Nicholas Allen's Indigo Blog | 0 Comments Filed under: Indigo, Announcements, Contracts, Addressing

• Semantic Annotations for WSDL

  The other day the W3C released a new recommendation called Semantic Annotations for WSDL and XML Schema . Semantic annotations are used to connect an element in a structural model to an element in a semantic model. The semantic model element describes the meaning or purpose of the structural element when it appears in a document. Most message processors only care about the document structure but a human reader cares about the document meaning as well. There are many different ways that meaning can be recorded. This standard just provides a way to construct the connections. I've never had anyone ask for a feature like this so I'd be curious to know how you'd want to use it. I could see some benefit to annotating a business process or an application entry point with information about the meaning of the exchanged messages. Originally, these systems had both their structure and semantics described by text documents. There has been standardization for describing structure but the semantics have remained in those text documents. It's interesting to be able to recouple the two together so that they don't get separated. Read More... Posted Thursday, August 30, 2007 8:00 AM from Nicholas Allen's Indigo Blog | 0 Comments Filed under: Announcements, Contracts

• WSDL 2.0 Completed

  Yesterday morning it was announced to the W3C membership that the Web Services Description Language 2.0 (WSDL 2.0) was officially a standard. WSDL is an XML language for describing web services using an abstract model for service operations. I mentioned a few weeks ago that WSDL had become a Proposed Recommendation, and the final version has come out a few days after the end of the comment period with a small number of minor revisions. You can get all of the parts of the specification at the W3C site. Web Services Description Language (WSDL) Version 2.0 Part 0: Primer Web Services Description Language (WSDL) Version 2.0 Part 1: Core Language Web Services Description Language (WSDL) Version 2.0 Part 2: Adjuncts Web Services Description Language (WSDL) Version 2.0: Additional MEPs Web Services Description Language (WSDL) Version 2.0 SOAP 1.1 Binding Web Services Description Language (WSDL) Version 2.0: RDF Mapping Read More... Posted Thursday, June 28, 2007 8:00 AM from Nicholas Allen's Indigo Blog | 0 Comments Filed under: Announcements, Contracts