Ideally an entity identifier is composed of attribute(s).

Entity identifier is composed of 4 attributes. It is used to determine the class of one entity. Each entity has its unique attributes. An identifying entity may use the below attributes:
1. date
2. title 
3. the complete address of the entity 
4. name of the performer

Answer blank(1); ; metadata;                     blank(2) consortium;                     blank (3); quantitative; i pretty sure these are correct, plz check first good luck