Fields
There are three kinds of fields in the ISO 2709 record:
- Record identifier field—identifying the record and assigned by the organization that creates the record. The record identifier field has tag 001.
- Reserved fields—Reserved fields supply data which may be required for the processing of the record. Reserved fields always have a tag in the range 002–009 and 00A–ZZZ.
- Bibliographic Fields—these are in the range 010–999 and 0AA–ZZZ. The bibliographic fields contain data and a field separator (IS2 of ISO 646). They can also have these optional sub-parts:
- Indicator (0–9 characters, as coded in the Leader)—Indicators generally provide further information about the contents of the field, the relationship between the field and other fields in the record, or about action required in certain data manipulation processes (including display labels).
- Identifier (0–9 characters)—This identifies data within the bibliographic field. Where used, identifiers are composed of a delimiter (1 char, IS1 of ISO 646) and an identifying code (1–9 chars, as defined in the leader), plus a variable length string containing the data.
Read more about this topic: ISO 2709
Famous quotes containing the word fields:
“Ah happy hills! ah pleasing shade!
Ah fields beloved in vain!
Where once my careless childhood stray’d,”
—Thomas Gray (1716–1771)
“For wheresoe’er I turn my ravished eyes,
Gay gilded scenes and shining prospects rise,
Poetic fields encompass me around,
And still I seem to tread on classic ground.”
—Joseph Addison (1672–1719)
“When we walk, we naturally go to the fields and woods: what would become of us, if we walked only in a garden or a mall?”
—Henry David Thoreau (1817–1862)