equal
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replaced
40 Let us detail a little the divergences between E/R and |yams|: |
40 Let us detail a little the divergences between E/R and |yams|: |
41 |
41 |
42 * all relationship are binary which means that to represent a |
42 * all relationship are binary which means that to represent a |
43 non-binary relationship, one has to use an entity, |
43 non-binary relationship, one has to use an entity, |
44 * relationships do not support attributes (yet, see: |
44 * relationships do not support attributes (yet, see: |
45 https://www.logilab.net/cwo/ticket/341318), hence the need to reify |
45 http://www.cubicweb.org/ticket/341318), hence the need to reify it |
46 it as an entity if need arises, |
46 as an entity if need arises, |
47 * all entities have an `eid` attribute (an integer) that is its |
47 * all entities have an `eid` attribute (an integer) that is its |
48 primary key (but it is possible to declare uniqueness on other |
48 primary key (but it is possible to declare uniqueness on other |
49 attributes) |
49 attributes) |
50 |
50 |
51 Also |yams| supports the notions of: |
51 Also |yams| supports the notions of: |