[topicmapmail] Zero or more roleplayers in XTM 1.0.1

[Steve Pepper]

At 00:24 14.11.2002 +0100, Marc de Graauw wrote:
>This was a change since 1.0, which required at least one. I am curious about
>the reason for this change - at first sight having a member element with a
>role specification but with zero role players does not seem to make sense, but
>since the change was very intentional presumably there is a good reason which
>I fail to see. Can anybody help?

It was always the intention that it should be possible to specify
a role without specifying the role players. The rationale is to be
able to represent incomplete knowledge. (I know Marc is married, but
I don't know who his wife is...)

Steve

--
Steve Pepper, Chief Executive 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