ISO 12620 data categories section 09

Section 9: Documentary language

Description: A formalized language used to characterize data or the content of documents to permit their storage and retrieval.

9.1 thesaurus name - see A.9.2

Admitted name: thesaurus

Description: The title of a thesaurus from which a descriptor is taken.

Note: Terminologically speaking thesaurus and thesaurus name are not synonyms, but as data category names, they function as if they were synonyms since the content of both categories will indeed be the name of a thesaurus.

DXLT Representation

<descrip='thesaurusDesriptor' target='thesaurusDescrip'></DESCRIP>

9.2 thesaurus descriptor

/B>Admitted name: descriptor

Description: The term in a thesaurus that can be used to represent a concept in a document or in a request for retrieval.

Note 1: For definition of related term, see ISO 5127-6:1983, 3.4.2-02

DXLT representation for A.9.2:

<descrip='thesaurusDesriptor' target='thesaurusDescrip'></DESCRIP>

The values of X are from this section (Section 9):
9.2.1 top term
9.2.2 broader term
9.2.3 narrower term
9.2.4 related term

Note 2: Although concept systems and thesauri can both be used to represent information and knowledge, concept systems are used to represent concept structures in terminology and information management, whereas thesauri are constructed specifically for information retrieval purposes in library science and documentation environments. The two traditions are subject to different conventions and rules and would not normally be combined. Nevertheless, a terminological entry can indicate that a term is a thesaurus descriptor in a documentary language. A number used to represent concept position or the position of a thesaurus descriptor is frequently called a notation.

9.2.1 top term

--use 9.2 thesaurus descriptor Description: A thesaurus descriptor representing the highest level concept in a hierarchical relation.

9.2.2 broader term

--use 9.2 thesaurus descriptor

Description: A thesaurus descriptor representing a superordinate term in a hierarchical relation.

Note: For definition of related term, see ISO 5127-6:1983, 3.4.6.2-01

9.2.3 narrower term

--use 9.2 thesaurus descriptor

Description: A thesaurus descriptor representing a subordinate term in a hierarchical relation.

Note: For definition of related term, see ISO 5127-6:1983, 3.4.6.2-04

9.2.4 related term

--use 9.2 thesaurus descriptor Description: <thesaurus descriptor> A term connected to another term by a coordinate or associative relation.

9.3 nondescriptor--Disallowed in DXLT

Description: A term in a thesaurus that must not be used to represent a concept, but that refers to one or more descriptors to be used instead.

Note: For definition of related term, see ISO 5127-6:1983, 3.4.2-03

Example: With reference to Annex C, Figure C.7, "Noise, engine" would be a nondescriptor.

9.4 keyword

Description: A word or group of words, possibly in lexicographically standardized, i.e., lemmatized, form, taken out of a title or of the text of a document characterizing its content and enabling its retrieval.

Example: The terms "data category" and "terminological entry" are keywords for this International Standard.

DXLT representation: <admin type='keyword'>...</admin>

9.5 index heading

Admitted name: index word
Description: A term chosen to be used in an index to represent an item or a concept in a document.

Example: All data categories specified in this standard are included as index headings in the index, as are a number of permuted forms, common synonyms, and variants.

Note: Keywords are frequently used as index headings, but not all index headings actually occur in documents, as it is good practice to also include those terms as index headings that a potential reader is likely to search for in a document.

DXLT Representation: <admin type='indexHeading'>...</admin>