IDR MINOR IDENTIFIERS

keller-plan in idr

Identifiers retrieve highly-specific subjects dealt with by a document. Minor Identifiers (IDR) denote secondary topics. Although you can search with the IDR field abbreviation, all Identifiers display with the ID field label.

For most precise results, search Identifiers as hyphenated, "bound" phrases. Hyphenate single-word Identifiers, such as orthography- in id, to limit the search to the single-word Identifier.