Hierarchical keywords

Date	2009/12/14
Contact(s)	Michael Stegherr
Last edited	Timestamp
Status	draft
Assigned to release	to be determined
Resources

Overview

Currently keywords appear in a flat structure. It should be possible to create a first level keyword 'Geophysics' and a second level keyword 'DayLST' depending on the keyword 'Geophysics', both of them appear at the same level in the search box. Right now we enter the keywords as 'Geophysics | DayLST' but it means we cannot search on the 'Geophysics' keyword. It would be nice to have the possibility to search the keywords by level as displayed on the pictures below:

Proposal Type

• Type: GUI Change, Module Change
• App: GeoNetwork
• Module: Search Interface

Links

• Documents:
• Email discussions:
• Other wiki discussions:

Voting History

• Vote proposed by X on Y, result was +/-n (m non-voting members).

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Motivations

The motivations for this change are:

• Less entries in search -> less confusion
• Search for broader terms, which include second-level keywords possible
• If necessary or too many results, drilling down to detail possible

Proposal

The current thesaurus manager is storing keywords in SKOS/RDF format, which allows creating term relationships (e.g. skos:broader, skos:narrower, etc) between keywords.

These relationships can be used to create a hierarchical structure between the keywords and list them according to this in the search interface.

Further development can include using web service based thesauri instead of local ones.

Backwards Compatibility Issues

Risks

Participants

• As above