Format
Codebook Exchange Format
Summary
- Name
- Codebook Exchange Format
- Identifiers
- PUID: fmt/2026
- Format type
- Text (Structured)
- Description
- Codebook Exchange Format (.qdc) is a file format for sharing codes so that they can easily be read by different types of Qualitative Data Analysis software. Files contain an xml header followed by the names of coding categories (name=), and a description (<Description>) of what data goes into that category. They don’t contain the coded data itself. Qdc files help researchers share and interpret information consistently and reliably, and identify patterns in their data.
- File extensions
-
qdc - Source
- Cabinet Office / Cabinet Office
Internal signatures
Codebook Exchange Format
- Note
- BOF; Offset: 0-3; Magic Bytes: '<CodeBook xmlns="urn:QDA-XML:codebook:1:0"' and EOF; Offset:0-3; Magic Bytes: '</CodeBook>'
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 38
- Max offset
- 50
- Byte Sequence
3C436F6465426F6F6B20786D6C6E733D2275726E3A5144412D584D4C3A636F6465626F6F6B3A313A3022- Endianness
- None
- Min Frag Length
- Absolute from EOF
- Offset
- 0
- Max offset
- 3
- Byte Sequence
3C2F436F6465426F6F6B3E- Endianness
- None
Changelog
-
Added in V120
- Release date
- 25 February 2025
Codebook Exchange Format: Signature researched and samples provided by Cabinet Office (UK).
Codebook Exchange Format: Full entry added. Submitted by Cabinet Office (UK).