Allow DB entries to be parents of other entries.

[ear1grey]

If DB entries can be parents or children of other entries, then the system can hold a hierarchy of links, so links can themselves 'be' categories and the initial categories can be better renamed as tags.

[tpunt]

I've attempted to implement this (see my fork), though I'm not entirely sure how you wanted it to work. The way I've done it enables you to add the URI of a parent link to a new child link. (Internally, this is done by searching the entries relation for the specified parent URI, and either returning the entry_id for that URI upon success, or null upon failure. This return value is then used when inserting the new child link for the parent_entry_id attribute value.) Displaying the links on the index page shows no sort of hierarchical structure yet though.

Is this something similar to what you were referring to?

[ear1grey]

Thanks Tom - very useful - I'll take a look (probably Tuesday) to see your ideas.

[ear1grey]

Implemented in ede92d7e002ce669cd986004fbcf1765277f514f