The tool utilizes a community-accepted ontology.

Previous versions of the tool are made available.

Licensing information is provided on the tool’s homepage.

The tool can be accessed programmatically through an API and follows community standards for open APIs

The availability of machine-readable metadata that describes a digital resource.

Contact information is provided for the creator(s) of the tool and information describing how to cite the tool is provided

Reusability is not only a technical issue; data can be discovered, retrieved, and even be machine-re...

The tool has a unique name and an informative description

Most people use a search engine to initiate a search for a particular digital resource of interest. ...

The tool can be freely downloaded or accessed from a webpage

The change to an identifier scheme will have widespread implications for resource lookup, linking, a...

Tutorials for the tool are available on the tool’s homepage

Some digital resources comprise of sensitive data, and require additional measures (such as institut...

Source code is shared in a public repository and is documented

Digital resources and their metadata should be retrievable throguh standardised communication protoc...