For the purposes of this document, the following abbreviated terms apply:
| ASCII | American Standard Code for Information Interchange |
| ASN | Abstract Syntax Notation |
| CSI | code space identifier |
| DMO | dictionary maintenance organization |
| DTD | document type definition |
| HTML | HyperText Markup Language |
| IG | identification guide |
| OTD | open technical dictionary |
| URI | uniform resource identifier |
| URL | uniform resource locator |
| VI | version identifier |
| XML | Extensible Markup Language |