RE: [codelist] notes and open questions in requirements

["G. Ken Holman" <gkholman@CraneSoftwrights.com>]

Many thanks, Jim and Howard for posting and responding.

Howard's observations resonated well with me when 
he posted them ... would anyone like to add 
anything new before tomorrow's teleconference?

. . . . . . . . . . Ken

At 2006-10-12 13:54 +0100, Mason, Howard \(UK\) wrote:
>My thoughts HGM> inserted below.
>
>Howard Mason
>...
>
>From: Harris, Jim [mailto:jharris@ncsc.dni.us]
>Sent: 11 October 2006 19:46
>To: codelist@lists.oasis-open.org
>Subject: [codelist] notes and open questions in requirements
>
>We agreed in today’s teleconference that 
>resolution was needed on some of the 
>requirements that included notes and/or open 
>questions.  These may or may not require changes 
>to the requirement, but need to be reviewed to 
>make that determination.  I have echoed the affected requirements below:
>
>R14 Metadata can have a particular simple type
>
>Metadata columns can have a defined data 
>type.  The W3C XML Schema simple types are the 
>default set, but a different datatype library 
>can be specified (through the use of an identifying URI).
>
>Facets can be defined to restrict the data type 
>(e.g. length, minimum/maximum, or pattern restrictions).
>
>Note: there is an option question around whether 
>it should be possible to define the “type” of 
>complex data (XML fragments) in some sense.
>
>HGM> Not a version 1.0 requirement
>
>R20 A code list can be derived from existing 
>code lists by removing all common columns before 
>aggregating the remaining columns
>
>It should also be possible to remove common keys 
>as well as common columns.  A column cannot be 
>removed unless all keys that it is part of are 
>removed, and there aggregate must contain at least one key.
>
>Note: support for keys as well is columns is not yet implemented.
>
>HGM> Sensible requirement, which probably needs 
>to be accommodated in the metadata even if the 
>function is not implemented in 1.0
>
>R21 A derived code list can be required to 
>contain a source code list as a row-wise subset
>
>Note: there is an open question about whether it 
>should be possible to specify that only keys are 
>compared, or that only particular keys are compared.
>
>HGM>  Probably better to allow manual selection 
>prior to integration - implementation of the integration service
>
>R22 A derived code list can be required to 
>contain a source code list as a column-wise subset
>
>It should be possible to specify the subset via keys as well as via columns.
>
>Note: support for keys as well is columns is not yet implemented.
>
>HGM>  Non-critical
>
>R30 Each code list version has a unique 
>identifier, different to the version-independent identifier for the code list
>
>The code list definition contains the version 
>number (or string) as well as the unique identifier (a URI).
>
>Note: there is an open question around whether 
>metadata-only code lists should be required to 
>have explicit versions, especially for code 
>lists where it is unlikely that the columns and keys will change over time.
>
>HGM>  Unlikely not= never, so need the option for specifiying versions
>
>R33 Sets of code list versions can be represented
>
>It must be possible to specify a “configuration” 
>of versions of code lists that together form a coherent set for some purpose.
>
>Note: there is open question around whether it 
>should it be possible to include a 
>version-independent reference to a code list, 
>instead of a reference to a particular version of a code list.
>
>HGM> Essential requirement for reconstructing 
>previous configurations of codelists, eg for contractual reasons.


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