A resource name can be directly specified (a literal string), a string generated through a mask, or a combination of both. Regardless of the format chosen, the resulting resource name must be unique within the authority path to which it belongs.
Literal string
A literal string is a constant set of characters for a resource name. Requesting a literal string means to fully specify the resource name that will be assigned to the digital object. An example of a literal string would be a local accession number used as the resource name.
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urn-3:FHCL:sb8897
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URN mask
A URN mask is a placeholder that will be replaced with actual values by NRS. Mask fields may be added anywhere in the string and repeated. They are enclosed in braces { } to distinguish them from other parts of the string. The brace characters are not otherwise valid in a persistent identifier.
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