A thesaurus provides a controlled or standard set of terms used to index
the items included in the ZR Plus
database. Controlled thesaurus
terms retrieve the maximum number of relevant documents for the given
The thesaurus terms are used by indexers to describe
the contents of publications in a consistent, comprehensive, and concise
manner. These terms are included in the Descriptors (DE=) and Systematics
(SY=) fields of each record added to the database and are shown in uppercase.
Using our interactive Thesaurus
Search, you can browse for terms via a hierarchical, alphabetical,
or rotated index display. These display formats allow you to navigate
the thesaurus alphabetically or through the hierarchical relationships
between terms. After finding appropriate terms, you can submit a search
for those terms in the database descriptor field.
We would recommend that you try to locate a controlled
search term or terms in the ZR Plus thesaurus as the first step of any
search. If you find a suitable term for your search, also check narrower
terms and related terms for relevancy, select the appropriate term(s)
by clicking the check box(es) and carry out the search. You can include
all narrower terms of a broad thesaurus term by selecting to explode the
term in your search.
Where extensive hierarchies exist, the search may return
a warning that there are too many terms in your search - that is the number
of narrower terms is too large to perform an exploded search. The indexing
of ZR Plus allows you to work around this by carrying out a single
term search for the broader term in the Descriptors
(DE=) field. (Alternatively you can use a Keywords
(KW=) search which includes the Descriptors and Systematics fields.
If you cannot find a suitable controlled thesaurus term,
you can still search for the term using the Quick Search or Advanced Search
forms. We would recommend that the Descriptors (DE=) or Keywords (KW=)
fields are used in this case.
There are two thesauri associated with ZR Plus:
Controlled ZR Plus Terms
The ZR Plus Thesaurus file consists of approximately
10,000 records, comprising around 3,000 subject terms and 7,000 broad
taxonomic names arranged in a series of hierarchies.
Information is supplied for each term as follows:
- Scope Note - provides a definition on the term and notes on
its usage, with an indication of how this has changed over time. Terms
are mapped through time using ZR Plus Volume numbers. A list is provided
here to allow you to determine the database
update years associated with each volume
- Broader Term - indicates a term which is conceptually broader
in meaning than the lead term.
- Narrower Term - indicates a term which is conceptually narrower
in meaning than the lead-term.
- Related Term - indicates a term which is related in meaning
to the lead-term and should be considered for your search.
- Use - directs from a non preferred form of a term to a term
that can be used to search.
- Use for - indicates some of the most frequently encountered
synonyms, abbreviations, alternate spellings, etc.
- [+] - indicates that the lead term has narrower terms available
The hierarchies available are:
Animals and Man
Colour and Luminescence
Geological Time Periods
Immunology and Repair Mechanisms
Land and Freshwater Zones
Life Cycle and Development
Parasites, Diseases and Disorders
Skeletal and Supporting Structures
Whole Animal Physiology
|Taxonomic Name Hierarchies
Coelenterata and Ctenophora
Smaller Arthropod Groups
Smaller Protochordate Groups
Smaller Vermiform Groups
Trilobita (See also Trilobitomorpha)
Trilobitomorpha (See also Trilobita)
Tunicata (See also Urochordata)
Urochordata (See also Tunicata)
: if you search one of the top terms listed above, you
can review all narrower terms in that hierarchy to select an appropriate
The taxonomic names list is a collection of organism names derived from
Cambridge Scientific Abstracts databases. As ZR Plus only uses
Scientific or Latin names in its indexing, this list is useful in identifying
possible correct forms of names to use in your search. However, as the
list is not derived from ZR Plus sources, there may be some names
which do not appear in the ZR Plus database and others which have
alternative common/scientific name pairings.
To use the taxonomic names list to identify a possible Latin name, select
it in the thesaurus list and search for a common name such as "salmon"
using the Rotated listing. The database will return a list of scientific
names associated with the common name you searched. You can select one
or more of these names and search them in the ZR Plus database.