Page History

Why would you need to include number of pages in a report?

• physical collections inventory 
• planning collection shifts, especially when books are not located together and direct measurement (linear feet) is not feasible
• estimating the number of trucks needed to move materials to the Annex or another location
• doing tracers; height of volume and number of pages give an approximation of the size of the item being searched for
• counting the number of exposures needed to scan or copy a book

Where are page number data fields stored?

• in the MARC record, field 300, subfield a (the 300 field and the a subfield are both repeatable in a record). See Marc21 format for bibliographic data for details.
• page numbers are also extracted from the folio_inventory.instance table jsonb array and written to the instance_physical_descriptions derived table. See derivation code for this table.
• NOTE: Some electronic resources have a 300 field subfield a showing page numbers, if the original form of the work was print material

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It is impossible to account for every variation of page number entry in your query

Basic Code Template for Page Numbers

Here is some code with explanatory comments to serve as a basic template for adding data showing the number of pages in the physical items you have selected in your query.

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