Fill Character and Related values
A fill character (ASCII 7C16), represented in this document as a verticular bar ( | ), may be used in community information records in fields 004 , 007 , and 008 . A fill character may not be used in the Leader or in tags, indicator positions, or subfield codes. The presence of a fill character in a community information record indicated that the format specifies a code to be used by the creator of the record has decided not to attempt to supply a code.
Code u (Unknown), when it is defined, indicates that the creator of the record attempted to supply a code but is unable to determine what the appropriate code should be.
Code n (Not applicable) is defined in many coded positions to indicate that the characteristic defined by the positions is not applicable to the community information entity involved.
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