Versions Compared

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.
Comment: Fix typo

...

The resources which are immediate children of a given container. Properties are not counted as children.

Compact Node Definition (CND)

A file format defined by JCR here that allows for the definition of new resource types and namespaces. It is highly recommended that users do not modify Fedora 4's CND file, as such modifications may limit the ability for subsequent Fedora version upgrades of the repository installation.

Container (formerly known as: Object)

A container is a resource that represents intellectual entities and can also be used to aggregate other resources in a Fedora repository. Containers may container contain other containers or binaries and their nonRdfSourceDescriptions.

Datastream

See: NonRdfSourceDescriptionWithin the Fedora 4 model a Datastream comprises a binary and a NonRdfSourceDescription. Treat both together as a datastream; they only ever occur in a pair.

Dissemination

An approach previously available in Fedora 3 that allowed for binding a service from outside the repository to a content model or type for content. Note: disseminators, as such , do not exist in Fedora 4 itself, but the API-X effort will provide similar functionality by extending the core with specifications and optional machinery.

Federation (aka Projection)

See: Projection

Fixity

Fixity is a measurement or characterization of stored information at a given time. An identity between two values of fixity can be interpreted as some measurement of the integrity of the stored information over time. Fedora performs fixity checks on demand by comparing a stored checksum with one that is newly computed.

...

Creating, modifying or deleting resources in the repository generates events. The indexer monitors and processes these events; by ingesting relevant RDF to an external triplestore, for example.

...

An XML document, the schema of which is defined by the JCR specification, which has a format that represents JCR resources. It can be used to export/import a set of resources and properties into a repository.

Linked Data Platform (LDP)

...

A namespace is a container for a set of identifiers (also known as symbols, names). In Fedora 4, resource properties may belong to any namespace providing semantic assertions that support interoperable metadata. Namespaces are restricted to being an empty string or to a URI as defined in section 3 of RFC3986. An example of a namespace would be "http://purl.org/dc/elements/1.1/".

NonRdfSourceDescription (formerly

...

the properties of a datastream)

A nonRdfSourceDescription is a resource that describes a binary resource within the Fedora repository. A nonRdfSourceDescription is always accompanied by a binary, and vice versa.

...

Containers are defined by one or more rdf:types that describe the nature of the container. Similarly, every property will be an instance of a single rdf:type. The official definition can be found here.

Repository

A repository is a single, self-contained persistent store of information plus the software that is used to access and update that information. Fedora is a repository.

Resource

Resources are the primary organizational structure in the repository. A resource is any web-addressable entity, such as a container, a nonRdfSourceDescription, or a binary. Every resource has a name and a unique identifier, and can also be identified by a path. They are comprised of zero or more properties / child resources.

...