I moved the suggestion to an extra GitHub issue: https://github.com/BaseXdb/basex/issues/988
Edits are welcome, Christian On Wed, Sep 3, 2014 at 8:53 PM, Christian Grün <[email protected]> wrote: >> Possibly add signatures to allow removing a previously set property: >> >> db:set-property($db as xs:string, $path as xs:string, $key as xs:string) >> as empty-sequence() >> PROP SET [path] [key] > > Thanks, I missed that! An empty string, or an empty sequence would be an > alternative: > > > db:set-property($db > , "file.xml", "version", () > ) > >> Allowing arbitrary strings as keys is definitely helpful. > > I see advantages and drawbacks for both approaches. Maybe it is also > sufficient to restrict the character set of keys to those of element names > (i.e., NCNames)? > >> Thinking of possible use cases, one might use something like the below >> example to find all documents with a specific property value: >> >> for $a in db:properties('testdb')[properties/property[@name = >> 'prop1'][string() = 'value1'] >> return if (db:is-xml('testdb', $a/@resource)) then db:open('testdb', >> $a/@resource) else () > > Right. Here's one (of many) more way(s) to put it: > > let $db := 'testdb' > let $path := db:properties($db)[prop1 = 'value1']/@resource[db:is-xml($db, > .)] > return db:open('testdb', $path) > > C. >
