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Posted to j-dev@xerces.apache.org by "Sandy Gao (JIRA)" <xe...@xml.apache.org> on 2010/11/05 20:04:47 UTC
[jira] Updated: (XERCESJ-1427) Check subsumption relationship of
complex type particles
[ https://issues.apache.org/jira/browse/XERCESJ-1427?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sandy Gao updated XERCESJ-1427:
-------------------------------
Affects Version/s: (was: 2.9.1)
2.10.0
Summary: Check subsumption relationship of complex type particles (was: [GSoC]: Check subsumption relationship of complex type particles )
> Check subsumption relationship of complex type particles
> ---------------------------------------------------------
>
> Key: XERCESJ-1427
> URL: https://issues.apache.org/jira/browse/XERCESJ-1427
> Project: Xerces2-J
> Issue Type: New Feature
> Components: XML Schema 1.1 Structures
> Affects Versions: 2.10.0
> Reporter: Michael Glavassevich
>
> In XML Schema 1.1 [1], the sequences of sub-elements allowed by a complex type is determined by its content model, a particle [2]. When one complex type restricts a base type, its particle is required to accept less [3] than that of the base type. When <all> model groups [4] are used in the restriction type (while the base type may also have an <all> group or have a combination of <sequence>s and <choice>s), the "accept less" requirement becomes an interesting task. The student is expected to study this problem, research existing solutions to similar issues (e.g. those listed here [5]), and propose and implement a solution. This work also helps to address the Priority Feedback [6] in the specification regarding the usefulness and implementation difficulty of this feature.
> Possible Mentors: Sandy Gao
> [1] http://www.w3.org/TR/xmlschema11-1/
> [2] http://www.w3.org/TR/xmlschema11-1/#cParticles
> [3] http://www.w3.org/TR/xmlschema11-1/#cos-content-act-restrict
> [4] http://www.w3.org/TR/xmlschema11-1/#Model_Groups
> [5] http://www.w3.org/TR/xmlschema11-1/#subsumptionCheckP
> [6] http://www.w3.org/TR/xmlschema11-1/#derivation-ok-restriction
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