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7.1 What is fixity?

Example proceedures that might be used to verify fixity:

Checksums like MD5 or SHA1, often used for digital images.
XML Signatures
- not implemented
Per-segment results as used for time-based media
- not implemented

7.2 Transmission Fixity

MAY may be verified by including a Digest header (defined in [RFC3230]) in POST
MAY may be verified by including a Digest header (defined in [RFC3230]) in PUT

7.3 Persistance Fixity

MAY may retrieve the checksum of an LDP-NR by performing a HEAD request on it with the Want-Digest header
- mechanism: curl command for HEAD with header: -H "Want-Digest: md5,sha" will return, in the headers:
  Digest: sha=9f0f5b0c24303b003b5afaa0031e126cc6f7fa67,md5=0a85fd5f25c09a9f282b15e7758b3acd
may retrieve the MAY retrieve the checksum of an LDP-NR by performing a GET request on it with the Want-Digest header
- mechanism: curl command for GET with header: -H "Want-Digest: md5,sha" will return, in the headers:
  Digest: sha=9f0f5b0c24303b003b5afaa0031e126cc6f7fa67,md5=0a85fd5f25c09a9f282b15e7758b3acd