@prefix this: . @prefix sub: . @prefix schema: . @prefix gen: . @prefix np: . @prefix dct: . @prefix nt: . @prefix npx: . @prefix xsd: . @prefix rdfs: . @prefix prov: . sub:Head { this: a np:Nanopublication; np:hasAssertion sub:assertion; np:hasProvenance sub:provenance; np:hasPublicationInfo sub:pubinfo . } sub:assertion { sub:paragraph a gen:Paragraph; schema:about nt:NanopubTemplate; schema:title "Placeholders"; gen:hasContent """

A placeholder is a node in the template typed with one of the placeholder classes and given an rdfs:label; that label is what the form shows as the field's name.

The common kinds are: nt:LiteralPlaceholder for a short text and nt:LongLiteralPlaceholder for a longer one; nt:UriPlaceholder for a URI to be minted here and nt:ExternalUriPlaceholder for one that already exists elsewhere; nt:TrustyUriPlaceholder for the URI of another nanopublication; nt:AgentPlaceholder for a person or agent; and nt:RestrictedChoicePlaceholder and nt:GuidedChoicePlaceholder for values chosen from a list or looked up. nt:ValuePlaceholder accepts a text or a URI.

A placeholder can carry several types at once, for example a URI placeholder that is also an introduced resource. A few further, rarely needed types exist for special cases such as automatically escaped URIs.

"""; gen:hasPositionString "050" . } sub:provenance { sub:assertion prov:wasAttributedTo . } sub:pubinfo { this: dct:created "2026-09-10T10:15:50Z"^^xsd:dateTime; dct:creator ; dct:license ; npx:introduces sub:paragraph; rdfs:label "Placeholders"; nt:wasCreatedFromProvenanceTemplate ; nt:wasCreatedFromPubinfoTemplate , ; nt:wasCreatedFromTemplate . sub:sig npx:hasAlgorithm "RSA"; npx:hasPublicKey "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAl8cMusqtNyKA6UIsi3f7BAcZmHQXWxU0qk0PLsboMWQxYrGBfGgHTgRHJrBRxL+Zn9kJHKVmz2smDcjCBptXi/OwWy80gjsx+Pbe6IWz3zFPWF1UoFIKfPnC0slV67CQgdM853zW7Bmk9/uflCtK4EtZKmPdRGtUHVC7DTVvDBMDzLRGdE2KCBVN29EbM5GGVNvijYbaZQ9OFQPBkQshayqSIyGRr6rreJdkrRVLIzu3uuAjKYydaeXZWSN2JLnVBwrClKUxaEdCwhb5nXpMtKOMD+R+LgaXLeJUWM8BdRSYnta9ZqI5pHY4y3v+eW7J+HHeTvRbHvlik+Z4hFUXmQIDAQAB"; npx:hasSignature "cE4NbCvKMjar6AyvV6pShrRKJvLpkoWeI8KM3E8U33hByrAgJoTWqFVrKppx/tq/+KP4PFfEEM8aBlwCl8Dx98UMnh/63UWvxvdQB9AclQDf7VvUvU1ZCrPtCf0bTz/NGKiUUvIVAIpPvav+GQhJIcY7I73iKtXCI++4h54L70JrqRNLPs+IaQ78jrRoG5dnGtEGJPrehhLt1CBnytQvQb2Sn8HtlZqC6G6hhRFJWL14sC2Hw5UTq8o2q6O4KyXvyY69fB35ooM5jn3/K4LF3bhUv+QtsAlkNGVwTMAVC2FhLwORRun0l5ITh4a6LYWiPKCJDlvTc2gIe/nE5UL6qg=="; npx:hasSignatureTarget this:; npx:signedBy . }