Hello
Maybe somebody know how to construct the cardinality functions of
required for XPath 2.0, XQuery 1.0 and XSLT 2.0 ?
there are three functions normally,
fn:zero-or-one(item,item,...) Returns the argument if it contains
zero or one items, otherwise it raises an error
fn:one-or-more(item,item,...) Returns the argument if it contains one
or more items, otherwise it raises an error
fn:exactly-one(item,item,...) Returns the argument if it contains
exactly one item, otherwise it raises an error
How could I construct them with coding them ?
