[MFD] Schema Element Table format for Imaging System Model Spec

[MFD] Schema Element Table format for Imaging System Model Spec

William A Wagner wamwagner at comcast.net
Sat Jul 6 17:49:50 UTC 2013


Paul and WG,

>From PWG 5105.1-2004 PWG Semantic Model  (the initial print service model),
constraints appear to be range or maxlength for integers, and Type X Keyword
for strings. There are a few other sting constraints including DateTime,
and Uri (?), Repertoire,, etc.

 

I suggest that to list all of the elements in a separate section with their
'constraints' would be cumbersome.  Keyword values are already  listed and
we could add type  ID to that listing. Numeric integer constraints (0:MAX,
1:MAX, MIN:MAX, Maxlength=1023, Maxlength=127, Maxlength=63, Maxlength=255,
Maxlength=40)  seem to be of  a limited number of values, and could be
addressed in the element tables with notes. Other strings could be
identified in the description. 

 

Note however that, with few a exceptions, this document does not define the
non-complex elements; it provides a reference to their definition. So
constraints for such elements may be helpful, but would not appear to be
critical. These were not included in the MFD Model specification.

 

I solicit comments from the rest of the SM Working Group.

Thanks.

Bill Wagner

 

 

 

 

 

From: Paul Tykodi [mailto:ptykodi at tykodi.com] 
Sent: Wednesday, July 03, 2013 5:36 PM
To: 'Michael Sweet'; 'William A Wagner'
Cc: mfd at pwg.org
Subject: RE: [MFD] Schema Element Table format for Imaging System Model Spec

 

Hi Bill,

 

I prefer the last format as well.

 

One of the things I just learned from Pete, when he was briefing me on what
I need to know for validating the Schema diagrams in section 5 (System
Configuration) of the draft SM 2.0 document, was that Inter-elemental
Constraints cannot be shown in the XML and the text representation in the
tables is used to describe the constraints.

 

I don't know whether we might want to consider creating a specific section
in the SM 2.0 document for describing the constraints or not.

 

Best Regards,

 

/Paul

--

Paul Tykodi
Principal Consultant
TCS - Tykodi Consulting Services LLC

Tel/Fax: 603-343-1820
Mobile:  603-866-0712
E-mail:  ptykodi at tykodi.com
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From: mfd-bounces at pwg.org [mailto:mfd-bounces at pwg.org] On Behalf Of Michael
Sweet
Sent: Wednesday, July 03, 2013 4:43 PM
To: William A Wagner
Cc: mfd at pwg.org
Subject: Re: [MFD] Schema Element Table format for Imaging System Model Spec

 

I prefer the last format (what was used in the MFD Common Semantics and
Model)...

 

On 2013-07-03, at 4:12 PM, William A Wagner <wamwagner at comcast.net> wrote:

 

The Imaging System Semantics and Model V2 will include and update
information from MFD Common Semantics and Model and  the previous Service
specifications. Much of the contents of these documents consists of showing
hierarchical Schema graphics followed by detailed descriptions of the
elements in the diagram.  The earlier documents used three different
approaches for these descriptions, as indicated in the discussion document
posted at

 <ftp://ftp.pwg.org/pub/pwg/mfd/white/table_format_examples.pdf>
ftp://ftp.pwg.org/pub/pwg/mfd/white/table_format_examples.pdf

Each approach had its proponents and detractors. The most common format was
the single row per entry table used in the MFD Common Semantics and model.

 

The Imaging System document should  use a consistent approach for this
explanation of schema elements. Although difficulty in implementing the
format should be considered, it is also important that the approach be
useful and effective in describing the schema.  The three formats are
described to allow a working group consideration and decision, hopefully by
the next Semantic Model WG conference call.

Thanks,

Bill Wagne

 


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_________________________________________________________
Michael Sweet, Senior Printing System Engineer, PWG Chair

 


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