WIMS> RE: WIMS - containment vs metadata ID REF

From: McDonald, Ira (imcdonald@sharplabs.com)
Date: Wed Nov 09 2005 - 10:23:59 EST

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    Hi Harry,
     
    I'm a little fuzzy here too. Let me say that Pete Zehler and I have
    repeatedly researched
    the XML keyref and idref elements and they just weren't intended for
    declaring key element
    relationships (they presume that XML _attributes_ and not _elements_ are
    being referenced).
     
    However, Pete and I also agreed on WIMS telecons long ago that using
    containment was
    a bad (fragile) idea. Therefore, all of the WIMS top level objects (Agent,
    System, Service,
    etc.) have elements that _reference_ related or subordinate objects (Jobs,
    Resources, etc.),
    using the XxxReference datatypes (which support URI, name, or local integer
    ID references),
    rather than actually _containing_ the subordinate objects (like IPP unwisely
    did).
     
    In particular the WIMS protocol operations now do NOT require absolute URIs
    as Agent
    references, per Bill Wagner's good comment some time back that absolute URIs
    expose
    the customer's network topology.
     
    Cheers,
    - Ira
     

    Ira McDonald (Musician / Software Architect)
    Blue Roof Music / High North Inc
    PO Box 221 Grand Marais, MI 49839
    phone: +1-906-494-2434
    email: imcdonald@sharplabs.com

    -----Original Message-----
    From: Harry Lewis [mailto:harryl@us.ibm.com]
    Sent: Tuesday, November 08, 2005 12:51 PM
    To: imcdonald@sharplabs.com
    Cc: wamwagner@comcast.net
    Subject: WIMS - containment vs metadata ID REF

    My Chicago notes are cryptic about
    "containment vs metadata IDRef. Further investigation needed. Ira prefers
    containment. Doesn't see how IDRef can be used in the Printing classes".
    Is this a last call comment (that's not how I recorded it). Is this a WIMS
    protocol comment?
    Trying to get this into the minutes in a meaningful fashion.
    ----------------------------------------------
    Harry Lewis
    IBM STSM
    Chairman - IEEE-ISTO Printer Working Group
    http://www.pwg.org
    IBM Printing Systems
    http://www.ibm.com/printers
    303-924-5337
    ----------------------------------------------

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