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NameComponentType » History » Version 17

Davide Pesavento, 06/12/2020 09:59 AM

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# Name Component Type Assignment
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This document lists the assigned Name Component types as well as the reserves ranges of types for experimentation purposes.
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## Assigned types
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Component Type                       |   TLV-TYPE   | TLV-VALUE Format   | Description                           | Alternate URI Format  | Reference
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-------------------------------------|--------------|--------------------|---------------------------------------|-----------------------|----------
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Invalid                              |    0 (0x00)  | N/A                | Invalid name component type           | N/A                   | [NDN packet spec](https://named-data.net/doc/NDN-packet-spec/current/name.html)
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ImplicitSha256DigestComponent        |    1 (0x01)  | 32OCTET            | Implicit SHA-256 digest component     | `sha256digest=<hex>`  | [NDN packet spec](https://named-data.net/doc/NDN-packet-spec/current/name.html)
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ParametersSha256DigestComponent      |    2 (0x02)  | 32OCTET            | SHA-256 digest of Interest Parameters | `params-sha256=<hex>` | [NDN packet spec](https://named-data.net/doc/NDN-packet-spec/current/name.html)
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GenericNameComponent                 |    8 (0x08)  | *OCTET             | Generic name component                | "`8=`" prefix omitted | [NDN packet spec](https://named-data.net/doc/NDN-packet-spec/current/name.html)
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KeywordNameComponent                 |   32 (0x20)  | *OCTET             | Well-known keyword                    | (not defined)         |
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SegmentNameComponent                 |   33 (0x21)  | nonNegativeInteger | Segment number                        | `seg=<dec>`           | [NDN naming conventions](https://named-data.net/publications/techreports/ndn-tr-22-2-ndn-memo-naming-conventions/)
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ByteOffsetNameComponent              |   34 (0x22)  | nonNegativeInteger | Byte offset                           | `off=<dec>`           | [NDN naming conventions](https://named-data.net/publications/techreports/ndn-tr-22-2-ndn-memo-naming-conventions/)
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VersionNameComponent                 |   35 (0x23)  | nonNegativeInteger | Version number                        | `v=<dec>`             | [NDN naming conventions](https://named-data.net/publications/techreports/ndn-tr-22-2-ndn-memo-naming-conventions/)
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TimestampNameComponent               |   36 (0x24)  | nonNegativeInteger | Unix timestamp in microseconds        | `t=<dec>`             | [NDN naming conventions](https://named-data.net/publications/techreports/ndn-tr-22-2-ndn-memo-naming-conventions/)
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SequenceNumNameComponent             |   37 (0x25)  | nonNegativeInteger | Sequence number                       | `seq=<dec>`           | [NDN naming conventions](https://named-data.net/publications/techreports/ndn-tr-22-2-ndn-memo-naming-conventions/)
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## Reserved ranges
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Type (dec)  | Description
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------------|---------------------------------------
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3-7, 9-31   | Reserved
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38-200      | Unassigned (1-byte encoding)
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201-252     | For experimental use (1-byte encoding)
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253-3200    | Unassigned (3-byte encoding)
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3201-65535  | For experimental use (3-byte encoding)
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65536+      | Invalid values (5+-byte encoding)
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## References
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https://named-data.net/doc/NDN-packet-spec/current/name.html