1. DESCRIPTION OF THE DATA FIELD:

Variable length
Essential

2. DATA ELEMENT DEFINITION:

Initial year or year corresponding to the thematic content of the document.

3. NOTE:

a) If the thematic content refers to more than one year, record the final year in field 75 – Temporal Scope (TO).

b) Field typically used for documents covering historical, epidemiological aspects, or policy validity.

4. EXAMPLE:

a) 1945