Select nodes on a location path starting at the root node.
Select nodes on the RelativeLocationPath starting at the
document root, which is indicated by the initial //.
Note:
If you know the position of the node(s) to be selected in a document
tree, the query will generally run faster. Example: If you want to know which
type of medication has been used for the patients in the current database you
need not use //therapy/type, but can use
/patient/therapy/type instead.
It corresponds to the expression
AbbreviatedAbsoluteLocationPath defined in XPath,
Section
2.5, Rule 10.
Select all doctors who discharged patients:
//discharged/doctor
Select all persons whose pager numbers begin with a "3":
//name[../@pager ~= '3*']
Select all element nodes that are not immediate children of the root element node:
/*//*
RelativeLocationPath |