As usual, no guarantees I've got this right. . .
Changes since last time [1]:
1) Added Param Signature and Param;
2) Added Step Container and used it;
Known bugs:
1) We agreed to rename 'Signature' as 'Type' (or 'Component Type');
2) Pipelines don't have Signatures.
A generalisation I'm missing is that any given kind of Step has a
constant Signature across all instances, but each instance of a
Step Container has its own Signature. Also not _sure_ the
Signatures are the same in the two cases. . .
I don't know how to do Class-level properties in UML. . .
ht
[1] http://lists.w3.org/Archives/Public/public-xml-processing-model-wg/2006Aug/0096.html
--
Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
Half-time member of W3C Team
2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
Fax: (44) 131 650-4587, e-mail: ht@inf.ed.ac.uk
URL: http://www.ltg.ed.ac.uk/~ht/
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