XCQL Schema: mandatory sortKeys element

[Nicola Ferro <ferro@dei.unipd.it>]

Dear All,

I would like to point to your attention a probable inconsistence between the CQL draft specification and the XCQL XSchema.

In the XCQL Xschema of June 16, 2010 at

http://www.loc.gov/standards/sru/oasis/schemas/xcql.xsd

the sortKeys element is mandatory:

<xs:complexType name="xcqlDefinition">

<xs:sequence>

<xs:element ref="prefixes" minOccurs="0"/>

<xs:element ref="triple"/>

<xs:element ref="sortKeys"/>

</xs:sequence>

</xs:complexType>

On the other hand, in the draft CQL specification of September 20, 2010:

http://www.loc.gov/standards/sru/oasis/current/cql.doc

it is said that:

"A CQL query [...] may have a sort specification at the end, following the 'sortBy' keyword" (page 4)

as also reported in the ABNF query syntax:

cql-query = query [sort-spec] (page 8)

Best regards,

Nicola Ferro

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     Nicola Ferro   -   Ph.D. in Computer Science
     Assistant Professor

     Department of Information Engineering (DEI)
     University of Padua
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