author | Sandrine Ribeau <sandrine.ribeau@logilab.fr> |
Tue, 23 Dec 2008 13:15:23 -0800 | |
changeset 286 | 451a74c5652c |
parent 127 | doc/book/en/B020-define-schema.en.txt@ae611743f5c6 |
permissions | -rw-r--r-- |
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.. -*- coding: utf-8 -*- |
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Data model definition (*schema*) |
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================================ |
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The schema is the core piece of a `CubicWeb` application as it defines |
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the data model handled. It is based on entities types already defined |
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in the `CubicWeb` standard library and others, more specific, we would |
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expect to find in one or more Python files under the `schema` directory. |
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At this point, it is important to make clear the difference between |
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relation type and relation definition: a relation type is only a relation |
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name with potentially other additionnal properties (see XXXX), whereas a |
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relation definition is a complete triplet |
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"<subject entity type> <relation type> <object entity type>". |
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A relation type could have been implied if none is related to a |
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relation definition of the schema. |
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.. include:: B021-schema-stdlib.en.txt |
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.. include:: B022-schema-definition.en.txt |
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