Support OpenRefine Reconciliation Service API

[osma]

A way of performing batch searches for indexed databases would be useful. A standard way of doing that, with tool support (OpenRefine at least), would be to provide a Reconciliation Service API: https://github.com/OpenRefine/OpenRefine/wiki/Reconciliation-Service-API

It should be decided whether this is a separate API (with a different URL base, e.g. /reconcile) or part of the REST API (just some new methods).

[osma]

Could use Lucene fuzzy searches (e.g. "kissa~") to find non-exact matches.

[tombaker]

@Webnet @osma @woody544 The USDA National Agricultural Library (NAL) uses Skosmos and Annif, and having Skosmos or Annif serve as a OpenRefine reconciliation API would be very helpful.

Our use case is reconciliation of local CSV files to NALT.

Currently we are using a relative old but workable JAR file that creates a reconciliation interface for the local CSV. After some digging we have found no more up-to-date alternatives. There is a Python module that seemingly does the same thing, but we could not get it to run properly.

[tombaker]

See also NatLibFi/Annif#338 (comment)