[MFD] Re: [IPP] ISSUE: MustHonor/job-mandatory-attributes at different levels of a JobTicket/job template

[Michael Sweet]

On Aug 10, 2011, at 9:36 AM, Zehler, Peter wrote:
> All,
>  
> While updating the PWG Semantic Model and adding some missing MustHonor attributes I came across a bit of an issue.  I was adding MustHonor to  the elements directly under DocumentProcessing.  When I got to elements like CoverBack and MediaCol I noticed that some of the contained elements are also directly under DocumentProcessing (e.g. Media, MediaType).    It seems rather inconsistent to  control fidelity for a subset of a collection’s members.
>  
> The issues comes down to which elements can be decorated with  MustHonor and what limitations on attribute names  are made for the job-mandatory-elements.

I did some reading this morning; section 3.1.2 of PWG 5100.7 has this to say about member attributes:

The values of the “job-mandatory-attributes” attribute are the keyword attribute names that identify Job Template attributes; for example, ‘job-hold-until’, ‘job-finishings’ (see section 4.1.3.3), ‘copies’ and ‘media’. In order to identify a member attribute of a collection attribute, the keyword names of both the collection attribute and the member attribute are given separated by a period (.) character. For example, to make the “media” attribute of the “cover- front” collection attribute mandatory, supply the keyword value: ‘cover-front.media’. 

So it seems that the current IPP definition does, in fact, allow a client to make only certain member attributes mandatory in a collection. Thus if you specified "media-col" by itself then all member attributes in the collection are required while "media-col.media-size" would only make the size a mandatory element.

> My opinion is that it MustHonor should be placed on every processing element and any job template attribute can be used in job-mandatory-element.  I would expect that fidelity would work similar to documents inheriting job level attributes in multi-document jobs.  The “MustHonor” attribute at a node in the tree (e.g., MediaCol) applies to all subordinate nodes (e.g., MediaTooth) unless explicitly overridden.  The same semantics would apply for job-mandatory-elements.

I believe that is ultimately what the current IPP definition says, now that I've re-read it.

__________________________________________________
Michael Sweet, Senior Printing System Engineer, PWG Chair


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