What is necessary in the grammar of asl mapped out when describing physical space?

It is necessary to distinguish space used for reference and space that is mapped out.

"Grammar" is an arrangement of standards for utilizing a dialect. These standards control speakers in the right talking or marking of a dialect. American Sign Language has its own sentence structure framework, different from that of English. This means ASL language structure has its own standards for phonology, morphology, sentence structure, and pragmatics.