ONIX codelists Issue 50

Previous versions of the ONIX codelists are still available: Issue 36.

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List Code Heading Add Mod ?
27 Subject scheme identifier
Used with <SubjectSchemeIdentifier> <b067>
27 B2 Keywords (not for display)
For indexing and search purposes, MUST not be displayed. Where multiple keywords or keyword phrases are sent, this should be in a single instance of the <SubjectHeadingText> element, and it is recommended that they should be separated by semi-colons. Use of code B2 should be very rare: use B2 in preference to code 20 only where it is important to show the keyword list is specifically NOT for display to purchasers (eg some keywords for a medical textbook may appear offensive if displayed out of context)
33 34

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