author | Adrien Di Mascio <Adrien.DiMascio@logilab.fr> |
Fri, 30 Jan 2009 16:57:20 +0100 | |
changeset 543 | c0f2b6378f70 |
parent 292 | 2d9e83c34b23 |
child 1163 | 232aef110a0a |
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 |
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
7 |
the data model handled. It is based on entities types already defined |
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
8 |
in the `CubicWeb` standard library and others, more specific, we would |
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
9 |
expect to find in one or more Python files under the `schema` directory. |
93
9c919a47e140
[doc] total file reorganisation - phase 1 complete
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents:
diff
changeset
|
10 |
|
101
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
11 |
At this point, it is important to make clear the difference between |
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
12 |
relation type and relation definition: a relation type is only a relation |
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
13 |
name with potentially other additionnal properties (see XXXX), whereas a |
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
14 |
relation definition is a complete triplet |
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
15 |
"<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
|
16 |
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
|
17 |
relation definition of the schema. |
c9138325b89f
[doc] Initial translation for data model chapter.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
93
diff
changeset
|
18 |
|
93
9c919a47e140
[doc] total file reorganisation - phase 1 complete
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents:
diff
changeset
|
19 |
|
292
2d9e83c34b23
[doc] Renaming of part II sub-sections accordingly.
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
287
diff
changeset
|
20 |
.. 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
|
21 |
.. include:: B0012-schema-definition.en.txt |
93
9c919a47e140
[doc] total file reorganisation - phase 1 complete
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents:
diff
changeset
|
22 |