ContentType » History » Revision 19
Revision 18 (Davide Pesavento, 01/13/2023 06:39 PM) → Revision 19/23 (Varun Patil, 02/07/2025 10:10 PM)
# ContentType
The following table defines the currently assigned values for the `ContentType` element in NDN Data packets.
ContentType | Value (dec) | Description of the content | Reference
-------------|-------------|----------------------------|----------
Blob | 0 | Payload identified by the data name; this is the default ContentType | [NDN packet spec](https://docs.named-data.net/NDN-packet-spec/current/data.html)
Link | 1 | Another name which identifies the actual data content | [Link object](https://docs.named-data.net/NDN-packet-spec/current/link.html)
Key | 2 | Public key; certificate | [Certificate](https://docs.named-data.net/NDN-packet-spec/current/certificate.html)
Nack | 3 | Application-level NACK | [NDN packet spec](https://docs.named-data.net/NDN-packet-spec/current/data.html)
Manifest | 4 | Manifest | #3301
PrefixAnnouncement | 5 | Prefix announcement object | [[nfd:PrefixAnnouncement]]
EncapsulatedData | 6 | Encapsulated Data packet | Used by SVS-PS
SigningKey | 9 | Unencrypted asymmetric private key | Used by NDNd
*(reserved)* | 7-1023 | Reserved for future assignments
FLIC | 1024 | File-Like ICN Collection (FLIC) | [draft-irtf-icnrg-flic](https://datatracker.ietf.org/doc/draft-irtf-icnrg-flic/)
*Experimentation range* | 9000-9999 | Reserved for experimentation |
## Experimentation range
TBD
## References
https://docs.named-data.net/NDN-packet-spec/current/data.html#contenttype