Select nodes on the absolute path.
An AbsolutePathExpr is a path expression originating in the
document root /. There are two variants depending whether the path
directly begins at the document node using /, or whether there is
an initial sequence of nodes in front of the relative path expression that
follows, which is the case for //.
An initial / in an AbsolutePathExpr is short
for the step fn:root(self::node()). The path begins with the root
node that contains the context node. An initial // is an
abbreviation for the steps
fn:root(self::node())/descendant-or-self::node(). A node sequence
is created that contains all the nodes in the same hierarchy as the context
node. For both variants of this expression it is an error if the context item
is not a node.
The following construct(s) refer to this construct:
This construct is also related to the following construct(s):
RelativePathExpr
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