Subjects and Occurrences

This API can be used to query subjects and occurrences from controlled vocabularies used to describe records in K10plus catalogue. An occurrence gives the number of times a selected concept is used for subject indexing in K10plus database records. Co-occurrences give the number for combination of concepts so they can be used as mapping recommendations. This service allows to query (co-)occurrences of selected vocabularies (RVK, BK, DDC...) from K10plus database. The results are partly based on a database snapshot.

Query Subjects

Load

API

Endpoints

• /subjects (documentation) to get subjects of a given record (query parameters record and optional scheme)
• /records (documentation) to get records with a given subject (query parameter subjects)
• /occurrences (documentation) to get occurrences for given concept (query parameter member), co-occurrences for given concept and vocabularies (parameters member and scheme), or of given document (query parameter record).
• /voc (documentation) lists supported vocabularies
• /databases (documentation) lists supported databases
• /status (documentation) returns information about the service

Sample Queryies

• occurrences of RVK DG 9000
• co-occurrences of RVK DG 9000 in DDC
• co-occurrences of RVK DG 9000 in all vocabularies
• subjects of a record (all vocabularies)
• subjects of a record (selected vocabulary)
• records of a subject

See also the full documentation and implementation for details. Extension and a web interface to use the API are planned (see #54).