On 10 April 2012 19:05, Thomas Baker <[log in to unmask]> wrote:
> On Tue, Apr 10, 2012 at 06:58:55AM +0200, Karen Coyle wrote:
>> I would like to see a discussion of SES and how it is being applied
>> in RDA, ISBD, etc. The definition in DCAM.
>>
>> "syntax encoding scheme (http://www.w3.org/2000/01/rdf-schema#Datatype)
>> A set of strings and an associated set of rules that describe a
>> mapping between that set of strings and a set of resources. The
>> mapping rules may define how the string is structured (for example
>> DCMI Box) or they may simply enumerate all the strings and the
>> corresponding resources (for example ISO 3166)."
>>
>> I see a need to clarify "set of strings" and "set of rules" and "set
>> of resources", and what form the mapping takes.
>
> One simple example is the string "2012-04-10" which, if contextualized by an
> appropriate SES, is mapped to the conceptual resource "tenth of March in 2012".
> The DCMI Usage Board did not take is as a requirement that a mapping such as
> the above be explicitly recorded somewhere. Rather, by calling something an
> SES, the Usage Board in effect considered the literals as hypothetically mapped
> to conceptual resources (dates, coordinate boxes, time periods, etc).
For some other examples, see the W3C XML Schema Datatypes specification
http://www.w3.org/TR/xmlschema-2/
which uses the terminology of "lexical space" ("set of strings") and
"value space" ("set of resources").
I often think the Boolean example is a nice one to consider, because
(i) both the lexical space and the value space are "small", so one can
easily "work through the whole set"
(ii) the concepts of "true" and "false" are fairly easy to grasp as
two distinct concepts
(iii) the act that two different components in the lexical space
("true" and "1") both map to a single component in the value space
(true-as-concept) (and similarly for the "false" case), (I think)
quite neatly illustrates the lexical space/value space separation and
the idea that a mapping is being made.
Pete
--
Pete Johnston
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