| Definition |
index (compared with concordance) is a glossary heading used for a concept related to ordered list, terms, cross-references, topics, ordered lists, table of contents in technical communication, documentation, publishing, training, or information design.
Index is a Database design concept used to identify rows, enforce rules, or define relationships among stored data.
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| Context & Usage |
The heading is useful as a searchable term because practitioners may encounter it as a source term, variant phrase, or related concept when working with ordered list, terms, cross-references, topics, ordered lists, table of contents. The local entry explains the relationship without treating the terms as interchangeable unless they are true equivalents.
Designers use this concept when enforcing uniqueness, relationships, referential integrity, and valid data states.
Related concepts include Foreign Key and Table.
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