152582 - XUL templates cannot use variables for predicates

Status: RESOLVED INCOMPLETE

(Core Graveyard :: RDF, defect)

Description

[Nick Gibbins]

XUL templates which have rule <triple> conditions that match triples and use a
variable (bound or unbound) for the predicate behave incorrectly.

In the event that the predicate variable has already been bound, the condition
matches (i.e. the rule fires) but any other (unbound) variables in that
condition are not bound. In the event that the predicate variable is unbound,
the condition does not match and the rule does not fire.

There's a comment in content/xul/templates/src/nsXULTemplateBuilder.cpp (in the
CompileTripleCondition() method) which suggests that this is a known issue and
that it may be addressed in the future, but this restriction on the use of
<triple> conditions is not made clear in the documentation for XUL templates.

Comment 1

[Nick Gibbins]

Attachment: XUL template testcase with bound predicate variable

Comment 2

[Nick Gibbins]

Attachment: Test data for bound predicate variable testcase

Comment 3

[Nick Gibbins]

Attachment: XUL template testcase with unbound predicate variable

Comment 4

[Nick Gibbins]

Attachment: Test data for unbound predicate variable testcase

Comment 5

[benc]

tever is not RDF QA anymore

Comment 6

[Axel Hecht]

waterson left the building