In some applications it may be important to specify a range
of a document rather than a particular point in a document. This
can be accomplished with the range axis. A range
begins at one XPointer and continues until another XPointer. A
range is indicated by the keyword range used as a
location term. However, it is followed by two location terms
separated by a comma. The first identifies the start of the
range and the second identifies the end of the range.
For example, suppose you want to select everything between
the first PERSON element and the last
PERSON element in genealogy.xml. This XPointer
accomplishes that:
range::/child::PERSON[position() = 1],/child::PERSON[position() = last()]