Re: [xacml] Text change request

[Polar Humenn <polar@syr.edu>]

<AttributeSelector>

AttributeSelector using an XPATH expression.

The AttributeSelector's "RequestContextPath" XML attribute shall contain a
legal XPATH expression over the <xacml-context:Request> element. The
selector element evaluates to a bag of a single primitive value that is
implied by the type system, i.e. the function application in which the
selector appears.

In case of using XPATH 1.0, the value of the XPATH expression is either a
node-set, string value, numeric value, or boolean value. If the XPATH 1.0
expression evaluates to a node-set, each node may consist of a string,
numeric, boolean value, or a child node (ie. structured node). In this
case, each node is logically converted to string data by applying the
"string" function defined in XPATH 1.0 specification resulting a sequence
of string data. In the single string, numeric, or boolean value case, the
value is converted to string data by applying the string function defined
in XPATH 1.0 specification resulting in a sequence of one string data
element. In XPATH 2.0, the result of the XPATH expression is always a
sequence of nodes. In this case, each node is logically converted to a
string using the aforementioned string function resulting in a sequence of
string data. The resulting sequence of string data is converted to a bag
of primitive values that is implied by the type system.