Changes between Version 9 and Version 10 of ISO15926Primer_HowItWorks_Templates

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Timestamp:
02/26/10 06:03:17 (14 years ago)
Author:
gordonrachar (IP: 198.53.220.181)
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  • ISO15926Primer_HowItWorks_Templates

    v9 v10  
    2525When engineers start a plant project, one of the first things we do is make templates of each kind of data sheet we expect to use to ensure a common look and feel across the project.  For instance, all data sheets for level transmitters will look the same, and have the same values in the same place.  The reason a common look and feel is important is because, traditionally, human beings are the ones reading the data sheets.  Humans rely on visual clues to determine meaning,  and we get used to, essentially, looking at certain (x,y) coordinates for particular values.  (For instance, "Maximum Allowable Working Pressure" for a control valve might be something like "1/3 of the way up the page near the right-hand side.") 
    2626 
    27 But in the full ISO 15926 world, machines are the ones reading the data sheets.  To a machine, the visual format means nothing--it is more interested in the precise definition of the terms.  And there is the rub:  To be interoperable based on ISO 15926-2, information has to be modeled rigorously to remove all ambiguity.  You cannot implement ISO 15926 ''partly'', you must go all the way.  But modeling information to the necessary degree of rigor is beyond what most design engineers will have time to do in a busy project. 
     27But in the full ISO 15926 world, machines are the ones reading the data sheets.  To a machine, the visual format means nothing--it is more interested in the precise definition of the terms.  And there is the rub:  To be interoperable based on ISO 15926-2, information has to be modeled rigorously to remove all ambiguity.  At the level of information modeling, you cannot implement ISO 15926 ''partly'', you must go all the way.  But modeling information to the necessary degree of rigor is beyond what most design engineers will have time to do in a busy project. 
    2828 
    2929Part 7 Templates, then, enable people who are not trained information modelers to achieve the high semantic precision of Part 2 without having to actually deal with Part 2.  In other words, Part 7 ''encapsulates'' Part 2. 
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