Open Radar

 
Summary:
The following NSXML methods:

    * objectsForXQuery:constants:error:
    * objectsForXQuery:error:
    * nodesForXPath:error:

epically fail to handle the descendant selector, running past the end of the element.

Steps to Reproduce:
1.  Use NSXML to read the DocBook RNG file.
2.  Issue the following queries:

    /grammar[1]/div[29]/define[4]/element[1]

    /grammar[1]/div[29]/define[4]/element[1]//ref


Expected Results:
The first query should return this element:

<element name="para"><a:documentation>A paragraph</a:documentation><s:pattern name="Root must have version"><s:rule context="/db:para"><s:assert test="@version">The root element must have a version attribute.</s:assert></s:rule></s:pattern><ref name="db.para.attlist"></ref><ref name="db.para.info"></ref><zeroOrMore><choice><ref name="db.all.inlines"></ref><ref name="db.nopara.blocks"></ref></choice></zeroOrMore></element>

and does.

The second query should return all of the <ref> elements within that blob.

Actual Results:
The second query returns all of the <ref> elements within that blob, plus every <ref> element from there to the end of the document.  Thus, searching for descendants is completely broken to the point of being unusable.


Version:
OS X 10.9.4


Notes:
I'm not the only one running into this:

http://stackoverflow.com/questions/24781425/nsxmlelement-nodesforxpath-name-returns-more-matches-than-descendants


Configuration:


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