| author | Emile Anclin <emile.anclin@logilab.fr> |
| Mon, 30 Mar 2009 14:27:19 +0200 | |
| changeset 1191 | 216141cf47a3 |
| parent 1163 | 232aef110a0a |
| child 1205 | 79d33f7db590 |
| permissions | -rw-r--r-- |
|
93
9c919a47e140
[doc] total file reorganisation - phase 1 complete
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents:
diff
changeset
|
1 |
.. -*- coding: utf-8 -*- |
|
9c919a47e140
[doc] total file reorganisation - phase 1 complete
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents:
diff
changeset
|
2 |
|
|
101
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
3 |
Data model definition (*schema*) |
|
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
4 |
================================ |
|
93
9c919a47e140
[doc] total file reorganisation - phase 1 complete
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents:
diff
changeset
|
5 |
|
|
101
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
6 |
The schema is the core piece of a `CubicWeb` application as it defines |
|
1163
232aef110a0a
doc improvements; typos
Emile Anclin <emile.anclin@logilab.fr>
parents:
292
diff
changeset
|
7 |
the data model handled. It is based on entity types that are either already |
|
232aef110a0a
doc improvements; typos
Emile Anclin <emile.anclin@logilab.fr>
parents:
292
diff
changeset
|
8 |
defined in the `CubicWeb` standard library; or more specific types, that |
|
232aef110a0a
doc improvements; typos
Emile Anclin <emile.anclin@logilab.fr>
parents:
292
diff
changeset
|
9 |
`CubicWeb` expects to find in one or more Python files under the directory |
|
232aef110a0a
doc improvements; typos
Emile Anclin <emile.anclin@logilab.fr>
parents:
292
diff
changeset
|
10 |
`schema`. |
|
93
9c919a47e140
[doc] total file reorganisation - phase 1 complete
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents:
diff
changeset
|
11 |
|
|
101
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
12 |
At this point, it is important to make clear the difference between |
|
1163
232aef110a0a
doc improvements; typos
Emile Anclin <emile.anclin@logilab.fr>
parents:
292
diff
changeset
|
13 |
*relation type* and *relation definition*: a *relation type* is only a relation |
|
101
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
14 |
name with potentially other additionnal properties (see XXXX), whereas a |
|
1163
232aef110a0a
doc improvements; typos
Emile Anclin <emile.anclin@logilab.fr>
parents:
292
diff
changeset
|
15 |
*relation definition* is a complete triplet |
|
101
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
16 |
"<subject entity type> <relation type> <object entity type>". |
|
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
17 |
A relation type could have been implied if none is related to a |
|
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
18 |
relation definition of the schema. |
|
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
19 |
|
|
93
9c919a47e140
[doc] total file reorganisation - phase 1 complete
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents:
diff
changeset
|
20 |
|
|
292
2d9e83c34b23
[doc] Renaming of part II sub-sections accordingly.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
287
diff
changeset
|
21 |
.. include:: B0011-schema-stdlib.en.txt |
|
2d9e83c34b23
[doc] Renaming of part II sub-sections accordingly.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
287
diff
changeset
|
22 |
.. include:: B0012-schema-definition.en.txt |
|
93
9c919a47e140
[doc] total file reorganisation - phase 1 complete
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents:
diff
changeset
|
23 |