size of XQuery developer community

[Martin Probst]

> There is also the option of JSON DBs like Perservere, MongoDB (and maybe
> CouchDB if you like the flatness). Gives you the same schema-less storage
> capabilities, but using JavaScript instead of XQuery. Which do you think is
> easier for someone to pick up? Of course, you are kind of screwed with a
> JSON DB if you deal with a good deal of mixed content.

JSON [expletive deleted] for mixed content, while XML/XQuery is pretty bad at
supporting key/value maps. Both is possible in each of them, but
painful. Judging from the attention to JSON and my own experiences,
key/value is a very important use case that is badly covered by XML at
the moment.

Alas, the various JSON DBs had - at least when I looked the last time
- practically no transaction support, and JavaScript as a query
language is of course not really optimizable for index usage etc. Then
again, no transactions and only being able to query by hash key
apparently works for a surprisingly large amount of people. Or maybe
their applications are not yet complex enought to feel the pain.

Martin