The British Library British Library Elements 1.0 2003-06-24 Draft Containing elements not found in qualified DC, DC-Lib or elsewhere but needed in the BLAP Place of Publication The place where the resource was published, issued or produced A broad interpretation of 'published' should be used for resources where the concept of publication is too narrow. Select a value from a controlled vocabulary of place names. String Optional Unbounded Extent Original The physical measurements of time duration of the original object that was digitised expressed as a string in a standard form. String structured according to the chosen encoding scheme Repeatable for size/duration Medium Original The medium of the original object that was digitised. Use a term from a controlled vocabulary. String 1 Item Number An identifier given to an individual item where that item is part of a larger source object. For use when multiple items share a shelfmark (or other identifier) if an object. For example, when a digitised image is only one of several images on a printed page. It can be concatenated with a shelfmark in Source for record conversions. Format Source BL Type List The British Library Type vocabulary. BL Medium List The British Library Medium vocabulary. BL Identifier A British Library identifier. May be or may incorporate the shelf mark. BL Item No A British Library Item Number. UK OS Grid Ref UK Ordinance Survey Grid Reference.