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| No Format |
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{
"digestAlgorithm": "sha256",
"caseMapping": "toLower",
"tupleSize": 3,
"numberOfTuples": 3,
"shortObjectRoot": false
} |
The SHA-256 hash of a Fedora resource's ID is calculated, converted to lowercase, then split into three-character segments. The first three segments are used in creating the first three levels of directories below the OCFL storage root. The OCFL object is persisted within a fourth-level directory, which is the entire, lowercase, SHA-256 value previously calculated. The extension definition provides an example.
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Outside of the ".fcrepo/" directory, all other OCFL object files store the content of Fedora resources. Every Fedora resource is persisted to OCFL using exactly two files. The first is a header file located in ".fcrepo/" and the second is a content file located in the root of the OCFL object's "content/" directory. The naming and location of content files can vary depending on the type of resource they belong to. It is not necessarily possible to identify a resource's content file without first determining what type of resource it is by reading its header file.
Header Files
..For a full description of the contents of Fedora header files, see Design - Fedora Header Files.
RDF Files
ACLs
Binary Descriptions
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For a full description of the contents of Fedora RDF files, see Design - Fedora RDF Files.