No normalisation rulesAdditional properties:node class EXTIDNode classes: | 
| Data type | Description | Note | |
|---|---|---|---|
| formal system identifier (formal system id, fsi) | Node (subnode) | 
| Content property | SOSSEQS | 
|---|
| Data type | Description | Note | |
|---|---|---|---|
| included entities (inclents) | Node list (internal ref) | Entities included from notation data, specified using the "included" FSI entity usage attribute.  | |
| modification level (mod level, modlevel) | Integer | The (possibly invalid) modification level of the entity.  | |
| valid modification level (valid mod level, validmod) | Integer | The valid modification level of the entity.  | |
| bit combination size (bitcsize) | Integer | ||
| word size and bit-combination ordering (word size, wordsize) | Integer list | ||
| alternative SOS sequences (sos sequences, sosseqs) | Node list (subnode) | 
| Content property | SEQUENCE | 
|---|
A storage object specification sequence.
| Data type | Description | Note | |
|---|---|---|---|
| sos sequence (sequence) | Node list (subnode) | 
| Content property | SOI | 
|---|
| Data type | Description | Note | |
|---|---|---|---|
| storage manager name (smname) | String | ||
| record boundary indicator (records) | Enumerated value
  | ||
| record tracking (tracking) | Boolean | ||
| bit combination transformation format (bctf) | String | ||
| occupied extents (extents) | Node list (subnode) | ||
| zap end-of-file (zap eof, zapeof) | Boolean | ||
| compression information (compress) | String | ||
| encryption information (encrypt) | String | ||
| integrity information (seal) | String | ||
| storage object identifier (storage object id, soi) | String | 
| Content property | none | 
|---|
| Data type | Description | Note | |
|---|---|---|---|
| first octet (firstoct) | Integer | ||
| octet count (octcount) | Integer | ||
| last octet (lastoct) | Integer |