Indexing depth
Indexing depth describes the specificity of the keywords or descriptors assigned . In principle, it is particularly high for facts within the core area of the documentation language , while it is rather low for peripheral aspects. The higher the indexing depth, the higher the precision of a search.
example
So one is z. For example, in the documentation language of a legal database, you can hardly find the term "Golden Retriever" as a descriptor (at most as a non-descriptor ). Perhaps, however, "pet" or "keeping pets" will be found as a valid descriptor, since the relative proportion of documents containing this matter will be relatively small in the total number of documents.
In the documentation language of a zoological database, the term "domestic animal" can certainly appear as a descriptor and can also be used for documents that deal with domestic animals in general. However, there will be other sub-terms for "pet", such as "dog" or "golden retriever", which are more useful for indexing more specific facts.