Re: [xtm-wg] Smalltalk Implementation of Topic Maps

[Steve Pepper <pepper@ontopia.net>]

At 15:34 26.04.2001 +0200, Daniel Schweizer wrote:
>> Your modelling of scopes is not correct. Scopes apply to both topics and
>> associations. They are fundamental to both. They are not just for added
>> themes, but have a fundamental role in providing views of data.
>
>martin, i read: "in topic maps everything is a topic" - so if associations
>and occurrences would be topics as well, they would inherit the feature of
>scopes? how do i draw an inheritance relation and an aggregation between 2
>entities at the same time? i gave it a try, see:
>http://www.iam.unibe.ch/~dschwzr/diploma/

Where did you read that "in topic maps everything is a topic".
That is not the case. Whoever wrote it is WRONG!!!!

For example, a name is not a topic. (It can be *reified* as a topic,
but until then it's just a plain ol' characteristic.)

Also, as I pointed out earlier, *topics do not have scope*.

Topic *elements* can have scope *attributes* (in the ISO syntax),
but this is just a shorthand for specifying (additional) themes
that are common to all the name and occurrence characteristics
specified by that element.

Steve

--
Steve Pepper, Chief Technology Officer <pepper@ontopia.net>
Convenor, ISO/IEC JTC1/SC34/WG3  Editor, XTM (XML Topic Maps)
Ontopia AS, Waldemar Thranes gt. 98, N-0175 Oslo, Norway.
http://www.ontopia.net/ phone: +47-23233080 GSM: +47-90827246


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