forked from marklogic-community/Corona
Simplified XPath
hunterhacker edited this page Oct 13, 2011
·
3 revisions
Simplified XPath statements look and feel exactly like traditional XPath 1.0 statements but only support positional predicates, not boolean predicates. For example, here are some valid simplified XPath statements:
foo/bar[1]
foo/@bar
foo/ancestor::bar
foo/following-sibling::bar
foo[1]/bar[2]
Notice how all the predicates simply contain positional information (fetch me the first bar or the second baz). Predicates that contain logic (eg: foo[bar = "baz"]) are not valid.
- ancestor::
- ancestor-or-self::
- attribute:: (@ shortcut is also supported)
- child::
- descendant::
- descendant-or-self:: (// shortcut is also supported)
- following::
- following-sibling::
- preceding::
- preceding-sibling::
- namespace::
- parent:: (.. shortcut is also supported)
- self::
Or expressions like /message/headers/(a|b) aren't allowed. They'd sure be handy though.