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Re: XML Protocols Shakedown

From: Anders W. Tell <anderst@toolsmiths.se>
Date: Mon, 22 May 2000 21:41:58 +0200
Message-ID: <39298D86.8C71675@toolsmiths.se>
To: Michael Condry <Michael.Condry@eng.sun.com>
CC: xml-dist-app@w3.org, connolly@w3.org
Michael Condry wrote:

> I made an earlier email comment about a "Lack of Sandbox".
>
> The point is the lack of ability to contain things with
> an application level protocol that allows an general
> execution engine (by the schema).   This is nothing
> to do with the Java Sandbox.

One method of providing an extra level of sandboxing is
to add an "interaction" model which both communicating
parties must agree on, in addition to the "schema agreement".

This interaction model may be defined ala UML or more formally
in a specification language such as SDL (Specification and Description
Language) which is recommeded by ITU.

Another method I have implemented in XIOP, is a metamodel
consisting of "encoding-stereotypes" (grove nodes, properties) and a set

of "forms" (how nodes/properties are encoded in XML and other formats)
So in XIOP the communicating parties agrees on sterotypes as defined by
OMG IDL types and message interactions as defined by OMG GIOP
transport specification. This type of metamodel increases the semantical

content of each  message and allows for other types of encoding formats
suchs a binary ones.

Together with the other Corba security concepts, authentication,
credentials,
confidentiality, integrity,access controll, audit it is an fairly far
reaching
sandbox from which many ideas can be considered for a W3C RPC protocol.

Sooner or later the cat is out of box, and yes it better be
when you trust yourself to handle the cat properly :)

/anders
--
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/  Anders W. Tell                     /
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Received on Monday, 22 May 2000 15:40:30 GMT

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