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From "Karthick Sankarachary (JIRA)" <j...@apache.org>
Subject [jira] Updated: (ODE-411) Express Yourself - With XQuery
Date Thu, 20 Nov 2008 22:32:44 GMT

     [ https://issues.apache.org/jira/browse/ODE-411?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Karthick Sankarachary updated ODE-411:

    Attachment: xquery-support-for-trunk.txt

> Express Yourself - With XQuery
> ------------------------------
>                 Key: ODE-411
>                 URL: https://issues.apache.org/jira/browse/ODE-411
>             Project: ODE
>          Issue Type: New Feature
>          Components: BPEL Compilation/Parsing, BPEL Runtime
>    Affects Versions: 1.2
>         Environment: platform-independent
>            Reporter: Karthick Sankarachary
>            Assignee: Karthick Sankarachary
>             Fix For: 2.0
>         Attachments: xquery-support-for-trunk.txt
> This issue is a duplicate of ODE-369 to track the integration of XQuery into Ode 2.x
> ---
> By default, the language employed in WS-BPEL queries and expressions is XPath 1.0. This
is denoted by the default value of the queryLanguage and expressionLanguage attributes, which
is "urn:oasis:names:tc:wsbpel:2.0:sublang:xpath1.0". In addition, we have out-of-the-box support
for XPath 2.0.
> Given that XQuery 1.0 is fast becoming the de-facto lingua franca for querying XML, it
is only fitting that it be given first-class status in WS-BPEL. Specifically, XQuery 1.0 goes
above and beyond XPath 2.0 by offering the capability to write conditional/switch/iterating
expressions, construct static/computed nodes, declare functions/variables, among other things.
> To that end, we propose leveraging WS-BPEL's extension mechanism to support the use of
XQuery 1.0 as a query and expression language. In particular, XQuery 1.0 will be indicated
by a specific value of the queryLanguage and expressionLanguage attribute, namely urn:oasis:names:tc:wsbpel:2.0:sublang:xquery1.0".
> The context for XQuery must be initialized with a set of bindings for in-scope variables,
declarations of in-scope namespaces and a library of WS-BPEL and core XPath functions. In
theory, one may import external XQuery modules into that context in a implementation-defined
way. However, the module feature will initially be out of scope.
> Best Regards,
> Karthick Sankarachary

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