630 Second indicator:  Value 1 - LC subject headings for children's literature

Value 1 indicates that the formulation of the subject added entry conforms to the "AC Subject Headings" section of Library of Congress Subject Headings maintained by the Library of Congress.  Use of value 1 requires that the field be appropriate for use in the LC Annotated Card Program.

Value 1 is an authoritative-agency data element.