Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Tools and Equipment (hierarchy name)
5. equipment
6. [equipment by process]
7. image-making equipment
8. [equipment for drafting, drawing, and writing]
9. [drafting, drawing and writing equipment by general type]
10. drafting equipment
11. drafting instruments

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment
4. Tools and Equipment
5. equipment
6. equipment by process
7. image-making equipment
8. equipment for drafting, drawing, and writing
9. drafting, drawing and writing equipment by general type
10. drafting equipment

Anotations

Scope note:

Drafting tools for drawing straight parallel lines, generally consisting of ungraduated strips of wood, metal, or plastic guided along drafting boards and held parallel by wires or strings passing through the ends of the rules; may or may not slide on rollers. For a set of two attached and pivoting rulers used often as navigational aids to transfer parallel lines, prefer "parallel rulers."