如何在关系上建立关系模型？

Question

I've to solve next problem:

I have 3 nodes:

(n:Node)-[r:HAS_ATTRIBUTE]->(a:Attr {name ="xxxx"}) ->(t:Type)

all the a:Attr nodes have :Translation associations:

(a) -> [:_HAS_TRANSLATION] -> (tr1:Translation {name : "yyyy", lang ="fr"})

(a) -> [:_HAS_TRANSLATION] -> (tr2:Translation {name : "kkkk", lang ="de"})

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Now, I would like to use relationships to model the same things:

(n:Node)-[r:HAS_ATTRIBUTE {name ="xxxx"}]->(t:Type)

How can I add translation to the HAS_ATTRIBUTE name property, of course without adding new _HAS_ATTRIBUTE to the n:Node ?

I should need to have such a thing as a RELATIONSHIP on the RELATIONSHIP ...

Answer 1

Hopefully I'm understanding your question.

Consider an intermediate node, eg

(n:Node)-[:HAS_ATTRIBUTE]->(attr:Attribute {name: "X")),
(attr)-[:HAS_TRANSLATION]->(tr1:Translation),
(attr)-[:HAS_TYPE]->(t:Type)

...or something of the like. Note that "attr" would be the new, intermediate node (you can name the relationships whatever you please, obviously).

If you need to be more specific (eg instances of attributes), you can always replace "attr" with something like "specificAttr" and have "attr" point to "attr".

Intermediate nodes are a great way of tackling modeling questions like this where you need to qualify a relationship more fully.

Answer 2

If I understand you correctly you want to have only 2 nodes and one relationship, right?

To achieve this you can simply do

(n:Node)-[r:HAS_ATTRIBUTE]->
(a:Attr {name ="xxxx", lang_fr="yyyy", lang_de="zzzz"})->
(t:Type)