Definitions for relations - best practices

[cboelling]

I would like to inquire if RO employs a set of best practices for the the textual definitions of relations or if there is a set of best practices / review criteria / wording patterns that would lend themselves for formulating such definitions in general.

With respect to definitions the RO documentation only states that:

Like all OBO ontologies, definitions are provided using an http://purl.obolibrary.org/obo/IAO_0000115 'definition' AP.
We strive to give each OP a definition. In practice we may omit definitions for OPs that are trivially the inverse of another defined OP (TODO link to tracker).