HMS common inside plant management information base (MIB) : SCTE-HMS-HE-RF-AMP-MIB / Engineering Committee, Hybrid Management Sub-layer Subcommittee, Society of Cable Telecommunication Engineers. (OCLC #953963863)

Though this piece has a cover and front matter in English, the bulk of the content (everything after page 1) is computer code (SNMP, maybe).

I coded the Lang fixed field as English:

Lang: eng

but considered that it is more similar to notated music, which is cataloged as having no linguistic content:

Lang: zxx

What do you think?


Nine seventeenth-century organ transcriptions from the operas of Lully / edited with an introduction by Almonte C. Howell. (OCLC #897477805)

The 048 field in MARC is for the Number of Musical Instruments or Voices Code. Each subfield $a typically contains a two-digit code for the type of instrument, followed by a two-digit number indicating the number of parts. This score contains pieces for a single organ player, so the code is:

048 __ ǂa kb01

All keyboard instruments start with k, and Organ is second on that list (ka is the code for piano).