-
predicates filter out more nodes from an ordered node-set S
- evaluate predicate on each node x in node-set S
with
-
x as the context node
- the size of S as the context size
- the position of x in S as the context
position
- predicate comprises
-
Boolean expressions: using
and
,
or
, not
, =
, ...
-
numerical expressions: using
+
,
-
, ...
-
node-set expressions: location paths filtered by
predicates
-
node-set functions