Re: [xacml] Text change request

[Michiharu Kudoh <KUDO@jp.ibm.com>]

Polar

The sentence you provide is basically fine.

[1]
in XPATH 1.0 specification resulting in a sequence of one string data
element.
==>
in XPATH 1.0 specification resulting in a bag of one string data
element.

[2]
Since XPath 2.0 returns either a sequence or the error value, we should say
that "the result of the XPATH expression is a sequence of items (item is an
atomic value or a node) or the error value. When the error value is
returned, the PDP SHOULD return Indeterminate."

Michiharu

IBM Tokyo Research Laboratory, Internet Technology
Tel. +81 (46) 215-4642   Fax +81 (46) 273-7428




                                                                                                                                       
                      Polar Humenn                                                                                                     
                      <polar@syr.edu>          To:       Michiharu Kudoh/Japan/IBM@IBMJP                                               
                                               cc:       XACML TC <xacml@lists.oasis-open.org>                                         
                      2002/09/27 00:47         Subject:  Re: [xacml] Text change request                                               
                                                                                                                                       
                                                                                                                                       
                                                                                                                                       




<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.