provides attributes for selecting particular elements within a
document by means of XPath.points at one or several elements or sets of elements by
means of one or more
data pointers, using the URI syntax.Elizabeth went
to Essex
If more than one identifier is given, the implication is
that all elements (or nodesets) are intended. The
match attribute may also be used as a means of
identifying groups of elements.
supplies an arbitrary XPath expression using the syntax
defined in which identifies a set
of nodes, selected within the context identified by the
target attribute if this is supplied, or within the
context of the element bearing this attribute if it is not.
The expression of certainty applies to the nodeset
identified by the value of the target attribute,
possibly modified additionally by the value of the
match attribute. If neither attribute is present,
the expression of certainty applies to the context of the
certainty element itself, i.e. its parent element.
Note that the value of the target attribute may include
an XPointer expression including an XPath expression (see
).