Who among the following have developed pre-coordinate indexing systems ? (i) S.R. Ranganathan (ii) Mortimer Taube (iii) Larry Page (iv) Derek Austin Codes :
(i) and (iv) are correct
Pre-coordinate indexing combines (coordinates) the component concepts of a subject into a single heading at the time of indexing, so the searcher finds a ready-made subject string. Post-coordinate indexing leaves the terms separate and lets the searcher combine them at the time of search.
(i) S.R. Ranganathan – developed Chain Indexing (1938), a pre-coordinate method that derives subject headings from the chain of a class number in Colon Classification. Developer of a pre-coordinate system.
(ii) Mortimer Taube – developed the Uniterm system (1953), the classic post-coordinate system in which single terms are posted on cards and combined at search time. Not pre-coordinate.
(iii) Larry Page – co-founder of Google, known for the PageRank link-analysis algorithm for ranking web pages (1998). Not a developer of a pre-coordinate indexing system.
(iv) Derek Austin – developed PRECIS (Preserved Context Index System) for the British National Bibliography (1968–1974), a pre-coordinate string-indexing system using role operators. Developer of a pre-coordinate system.
So the developers of pre-coordinate systems are Ranganathan and Derek Austin.
Hence, the answer is (i) and (iv) are correct.
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