17. Fields M07Z and C07Z – Unspecified

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General remarks for import

All “undefined” positions 02 are ignored.
All positions filled by fill characters are ignored too.
Only positions filled with “real” values are imported.
When a blank is a value or part of a string of values, it is replaced by a hash (#) during import.

General remark for export

When a hash (#) is a value or part of a string of values, it is replaced by a blank during export.

For more MARC 21 documentation:

Library of Congress http://www.loc.gov/marc/bibliographic/bd007z.html
OCLC, WorldCat https://www.oclc.org/bibformats/en/0xx/007unspec.html

Character	Description	CBS MARC tag / sbf.	PICA+ tag / sbf.	Import, online cataloguing and MARC 21 export
	Unspecified – 00 = z	M07Z	013Z
		C07Z	213Z
00	Category of material	$a	$a	Value must be “z”.
01	Specific material designation	$b	$b	During import from MARC 21 general When the value is present and is not \| - No attempt to code -, it is imported. When the value is \|, it is ignored. During import from WorldCat When the value is present and is not \| - No attempt to code -, it is imported. When the value is \|, it is ignored. During online cataloguing The value can be added or updated. During export to MARC 21 general When the value is present, it is exported. When the value is missing, \| - No attempt to code - is generated. During export to WorldCat When the value is present, it is exported. When the value is missing, \| - No attempt to code - is generated.

General remark (March 2020)

Although in the OCLC MARC 21 documentation, the fill characters (|) are not mentioned and other sources say that the fill character is not valid in any bibliographic 007 position, nevertheless we consider these as valid values, because they occur in records in WorldCat and can be selected from dropdown menus in Record Manager.