“ The objective of maximum use of [library] stock... can be assisted in two ways: (a) by personal assistance to readers Jack Mills - Chapter 1 The problem of arrangement in a library in Library Classification 1960 (b) By so arranging and displaying the collection that its resources are made as far as possible self-evident to the user. This will include the provision of catalogues and indexes…”

Current (1998) OPAC Opening Screen

ACM Digital Library

Now let us take a look at what the Dewey Decimal Classification has to offer for view-based searching

Dewey Hierarchies in a View-based Searching OPAC

Searching for Textiles on Dewey for Windows

600 Technology (Applied sciences) …. 670 Manufacturing …. 677 Textiles Designs (Working patterns) Techniques, procedures, apparatus, equipment, materials, products Operations … Power equipment Spinning machines Looms and loom equipment The Dewey Schedule for Textiles

“The classifier will often find that to arrive at a precise number for a work it is necessary to build or synthesise a number that is not specifically printed in the schedules. Such built numbers allow for greater depth of content analysis…. ….. Table 2 Geographic Areas, Historical Periods, Persons. Notation from Table 2 is added through the use of one of several standard subdivisions from Table 1 (09, 025, 074, etc.), e.g., reading instruction in the primary schools of Australia is (372.4 reading instruction in primary schools + 09 Historical, geographic, persons treatment from Table Australia from Table 2).” Instructions on synthesis

A fully faceted classification can recognise the concept “textiles” as independent of the relationship to “geographic location” can be synthesised as Geographic Location:Textiles or Textiles:Geographic Location. e.g. Holmfirth:Sheep Wool. The item being indexed could be retrieved from a higher level query of West Yorkshire:Textiles

View-based result from querying textiles

T2--4 Europe Western Europe T2--41 British Isles T2--42 England and Wales T2--43 Central Europe Germany T2--44 France and Monaco T2--45 Italian Peninsula and adjacent islands Italy T2--46 Iberian Peninsula and adjacent islands Spain T2--47 Eastern Europe Russia T2--48 Scandinavia T2--49 Other parts of Europe Problems of the division by 10

Dewey Hierarchies in a View-based Searching OPAC