ISSUE-63: Need to be able to specify collation with container ordering

Collation Support

Need to be able to specify collation with container ordering

State:

CLOSED

Product:

Linked Data Platform Spec

Raised by:

Ashok Malhotra

Opened on:

2013-05-06

Description:

On the May 6, 2013 telcon we resolved issued 14 with the proposal: An LDPC server can indicate to a client the ordering of members in a container page using an ldp:containerOrder property. This property has as range a list of resources with two properties: ldp:containerSortPredicate, which defines the property used for sorting and ldp:containerSortOrder, which defines the ordering (ascending or descending) and is optional.

Eric pointed out that the ordering uses SPARQL ORDER BY which is based on the 2 parameter fn:compare(A,B) function which takes no collation parameter. This means that e.g. "ö" and "oe" don't order next to each other in German.

To fix this problem I propose that we add an optional container property ldp:containerSortCollation. When this property is present the ordering should use the 3 parameter fn:compare(A,B,C) function. If the property is absent the 2 parameter fn:compare(A,B) function should be used.

Related Actions Items:

No related actions

Related emails:

1. LDP Rec (from eric@w3.org on 2015-02-20)
2. Re: Proposal to close ISSUE-63: Need to be able to specify collation with container ordering per Ashok's suggestion (from johnarwe@us.ibm.com on 2013-05-31)
3. Proposal to close ISSUE-63: Need to be able to specify collation with container ordering per Ashok's suggestion (from lehors@us.ibm.com on 2013-05-30)
4. ldp-ISSUE-63 (Collation Support): Need to be able to specify collation with container ordering [Linked Data Platform core] (from sysbot+tracker@w3.org on 2013-05-06)

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