To-do List

= Must-haves =
* CurrentNodeSpecifier
* XML output
* online demo
* update spec


= Nice to have =
* Namespace support for rt:element and rt:attribute
* count() function
* label() function
* rt:attribute with nodepath attribute or child elements
* rt:if
* rt:choose, rt:when, rt:otherwise
* validation of stylesheet, error reporting
* abbreviated syntax for current()

= Done =
+ NodePath needs to use NodeSelectors in null context
+ NodePath needs to use all NodeSelectors, not just first
+ abbreviated syntax for resource()
+ ArcPattern->equals compares all tests
+ NodePathParser parseArcPattern parses ResourceConditions
+ ArcPattern uses all ResourceConditions
+ NodePath scope specifier
+ Value of resource nodes - look for rdf:value now, traverse graph later
+ rt:macro-set, rt:macro
+ rdfs-entailment for RAP
+ rt:for-each
+ rt:import