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shapes and classes: different

From: Peter F. Patel-Schneider <pfpschneider@gmail.com>
Date: Mon, 26 Jan 2015 06:12:02 -0800
Message-ID: <54C64B32.1080900@gmail.com>
To: RDF Data Shapes Working Group <public-data-shapes-wg@w3.org>
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The most important aspect of classes is that you state that objects belong
to them.  If you don't state that objects belong to X, X is not a class.

The most important aspect of shapes is that you provide conditions stating
precisely when an object belongs to them.   If you don't provide conditions
stating precisely when an object belongs to X, X is not a shape.

Having shapes also be classes implies that you state that objects belong to
shapes.  Having classes also be shapes implies that you provide recognition
conditions for classes. Both situations are possible, but both have
consequences.

peter
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Received on Monday, 26 January 2015 14:13:00 UTC

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