| .01 | category name(+) | 0;1 | FREE TEXT | | B | Name of a terminology category specified by a source vocabulary (i.e.,
VA Drug Class as specified by NDF or Diagnostic class as specified by ICD). |
| 1 | category identifier | 0;2 | FREE TEXT | | ACID | A single code (i.e., NDF code AH200 for Antihistamines, Ethanolamine) or a
range of codes (i.e., ICD range of codes 001-009 for Intestinal Infectious
Diseases) assigned to the terminology category by the source vocabulary. |
| 2 | parent category | 1;1 | POINTER | 757.13 | | This is the internal entry number in the Source Category file #757.13 where
the parent category is located. |
| 3 | parent category identifier | 1;2 | FREE TEXT | | APID | If a source category has a parent, then the parent category identifier will
be included. It is a code or a range of codes assigned to the parent
category by the source vocabulary. |
| 4 | ancestor category | 2;1 | POINTER | 757.13 | | This is the internal entry number (IEN) in the Source Category file #757.13
where the ancestral category is located. Ancestral categories are
characterized as a category without a parent. |
| 5 | ancestor category identifier | 2;2 | FREE TEXT | | AAID | This is the identifier of the ancestral category and consist of a code or a
range of codes assigned by the source vocabulary. |
| 6 | family descendants | 3;1 | FREE TEXT | | | This is a listing of internal entry numbers starting with the ancestral
category to the named category (.01 field). The internal entry numbers are
delimited by the tilde (~) character. ~<...>~<...>~~ |
| 7 | family ancestors | 3;2 | FREE TEXT | | | This is a listing of internal entry numbers starting with the named category
(.01 field) to the ancestral category. The internal entry numbers are
delimited by the tilde (~) character. ~~<...>~<...>~ |
| 8 | source | 4;1 | POINTER | 757.14 | | This is a pointer to the Source file #757.14 containing the common and
acceptable name for the source of the category (i.e., NDF VA Drug Class,
ICD Three Digit Classification, etc), and the source file or document
containing the category. |
| 9 | system or group | 5;1 | FREE TEXT | | | This is the name of the system (i.e., cardiovascular, pulmonary, etc) or
group (pharmacy, etc) which is MOST frequently associated with the
source category. |