W3C home > Mailing lists > Public > www-ws-desc@w3.org > June 2004

Issues 225: new proposals

From: Mark Nottingham <mark.nottingham@bea.com>
Date: Wed, 16 Jun 2004 15:41:34 -0700
Message-Id: <520C6300-BFE6-11D8-8A84-000A95BD86C0@bea.com>
Cc: Roberto Chinnici <Roberto.Chinnici@Sun.COM>
To: www-ws-desc@w3.org

OK, in an attempt to consolidate discussion and make the changes 
crisper, so as not to make WSDL more vague, while still addressing the 
issue, I make the following proposals (split up for convenience):

Five direct text changes, (a) through (e).

Section 2.1.1:
a) "Type system components are element declarations drawn from some 
type system. They define the [local name], [namespace name], [children] 
and [attributes] properties of an element information item."
"Type system components describe the constraints on a message's 
content. By default, these constraints are expressed in terms of the 
XML Infoset (i.e., they define the [local name], [namespace name], 
[children] and [attributes] properties of an element information item). 
Type systems based upon other data models may be accommodated by 
extensions to WSDL; see Section 3."

Section 2.5.1:
b) "A Message Reference component associates to a message exchanged in 
an operation an XML element declaration that specifies its message 
"A Message Reference component associates a defined type with a message 
exchanged in an operation. By default, the type system is based upon 
the XML Infoset."

c) "If a non-XML type system is in use..." --> "If a type system not 
based upon the XML Infoset is in use..."

Section 3:
d) "At the abstract level, the {element declarations} property of the 
Definitions component is a collection of imported and embedded schema 
components. By design, WSDL supports any schema language for which the 
syntax and semantics of import (i.e., the ability to import some schema 
by reference) or embed (i.e., the ability to embed a schema directly 
into another document) have been defined. However, only the XML Schema 
implementation is defined in this specification. Instances of WSDL 
(i.e., WSDL documents) MAY require support for an alternative schema 
language by using the standard wsdl:required attribute information item 
(any imported or embedded XML Schema element information items may be 
regarded as having this attribute information item set)."
"""The content of messages and faults may be constrained using type 
system components. These constraints are based upon a specific data 
model, and expressed using a particular schema language.

Although a variety of data models can be accommodated (through WSDL 
extensions), this specification only defines a means of expressing 
constraints based upon the XML Infoset. Furthermore, although a number 
of alternate schema languages can be used to constrain the XML Infoset 
(as long as they support the semantics of either embedding or importing 
schema), this specification only defines the use of XML Schema.

Specifically, the {element declarations} of the Definitions component 
is a collection of imported and embedded schema components that 
describe Infoset Element Information Items.

When extensions are used to enable the use of a non-Infoset data model, 
or a non-Schema constraint language, the wsdl:required attribute 
information item MAY be used to require support for that extension.

e) "The types element information item encloses data type definitions 
used to define messages..." --> "The types element information item 
encloses data type definitions based upon the XML Infoset..."

Change the "types" element's name to "elements".

Ask the part 3 editors to identify the data models that defined 
bindings are compatible with.

Mark Nottingham   Principal Technologist
Office of the CTO   BEA Systems
Received on Wednesday, 16 June 2004 18:41:39 UTC

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