punctuation and adjective order in directed, labeled, graph data model

[TallTed]

sparql-query/spec/index.html

Line 355 in 93a429f

RDF is a directed, labeled graph data format for representing information in the

What is the correct punctuation?

1. directed labeled graph data model
2. directed, labeled graph data model
3. directed, labeled, graph data model
4. something else?

I'm currently leaning toward (3), above.

Google is useless on this question, so far as I can tell. It considers all punctuation and whitespace to be noise characters.

A secondary question is whether the order of adjectives ever changes — might anyone ever say that RDF is a labeled, directed, graph data model (apparently, yes, but not often) instead of a directed, labeled, graph data model -- and would these different orders actually mean different things (apparently, no)?

[niklasl]

It seems (1) is strictly OK but perhaps less friendly. It appeared more common (44 vs. 18 hits) on the first google result for "directed labeled graph" (in quotes, just now, for my personalized results...).

Got some advice, e.g. this succinct page on usu.edu, which seems to favor (2), as "graph" is not an adjective in the compound noun?

In practise, Ivan's use of "directed, labelled graph" settles it for me. 😉

(I hope that the adjective order doesn't matter; but consistently using "directed[,] labelled" feels appropriate to me.)