The FHS segment is used to head a file (group of batches) as defined in Section 2.23.3, "HL7 batch protocol."

2.24.11.0 FHS field definitions

12
C.LenElementv2.2
1..1-STR1-00067FHS-1File Field Separator
2..4-STR1-00068FHS-2File Encoding Characters
3..15-STO1-00069FHS-3File Sending ApplicationOptionality
4..20-STO1-00070FHS-4File Sending FacilityOptionality
5..15-STO1-00071FHS-5File Receiving Application2
6..20-STO1-00072FHS-6File Receiving Facility2
7..26-TSO1-00073FHS-7File Creation Date/TimeName
8..40-STO1-00074FHS-8File SecurityOptionality
9..20-STO1-00075FHS-9File Name/ID2
10..80-STO1-00076FHS-10File Header CommentOptionality
11..20-STO1-00077FHS-11File Control IDOptionality
12..20-STO1-00078FHS-12Reference File Control IDOptionality