The string typically decomposes as follows in a laboratory or software versioning context:

: Likely denotes the first primary iteration or major version of the material or code.

: Attributed to the principal investigator, Bongjun Yeom , whose email identifier is byeom@hanyang.ac.kr.

While "Byeom.123.1.var" does not appear as a standard identifier in public technical databases, the string structure strongly aligns with the research output of and his research group at Hanyang University.