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The OLE Instance document is a container for recording holdings and item information for a bibliographic record. Even though there is a standard for MARC Holdings (which has often been loosely followed), there isn't one for items and depending on the vendor systems, these are stored in different ways. OLE Instance defines a standard for storing holdings/item information in three different sections as described below.
2. Main Sections of the OLE Instance Document
- oleHoldings
- sourceHoldings
- items
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