@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix this: <http://purl.org/np/RA-NGcnJpJThYiiJ1Y3rMxdx8uXVpqKOZxgUAhwfC9quk> .
@prefix sub: <http://purl.org/np/RA-NGcnJpJThYiiJ1Y3rMxdx8uXVpqKOZxgUAhwfC9quk#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix prov: <http://www.w3.org/ns/prov#> .
@prefix np: <http://www.nanopub.org/nschema#> .
@prefix orcid: <https://orcid.org/> .
@prefix nt: <https://w3id.org/np/o/ntemplate/> .
@prefix npx: <http://purl.org/nanopub/x/> .
@prefix fip: <https://w3id.org/fair/fip/terms/> .

sub:Head {
  this: a np:Nanopublication;
    np:hasAssertion sub:assertion;
    np:hasProvenance sub:provenance;
    np:hasPublicationInfo sub:pubinfo .
}

sub:assertion {
  sub:DDI a fip:Available-FAIR-Enabling-Resource, fip:Data-schema, fip:FAIR-Enabling-Resource,
      fip:Metadata-schema;
    rdfs:comment "An international standard for describing the data produced by surveys and other observational methods";
    rdfs:label "Data Documentation Initiative";
    rdfs:seeAlso <http://www.ddialliance.org/Specification/> .
}

sub:provenance {
  sub:assertion prov:wasAttributedTo orcid:0000-0003-3517-8071 .
}

sub:pubinfo {
  sub:sig npx:hasAlgorithm "RSA";
    npx:hasPublicKey "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCK4NfUi+AdFS8l/WeyiKQmCyFyjrjfGnpHvUvdGUlkg2+FkOY3+31U4a4SdeLUdhf4hnxL8kQOjD8BuggdBkuwUoMA0RXPv+RblmlF5INhXDJvxTqeUMLj1EVuOtotpl//NVFZ3BE0zeuscT35szmX4L+2m14Z/PqreP2lMzbj3wIDAQAB";
    npx:hasSignature "ihQzVt8dJvUHpNjwU/f+PFnv4nfwMpwzo9BT2eulcOVZocgyUJE/pWHv44Y444oxIjra/7mtatrzyCag46P/TN740V27rUcUs5XH0qaJMjRdmM6/ykN4DONx8Ys/8DHUOBJHUgxFyyLNzHw5a04iaQL4lmud+6DxkQ5/2pN299g=";
    npx:hasSignatureTarget this: .
  
  this: dcterms:created "2020-11-13T18:44:53.779+01:00"^^xsd:dateTime;
    dcterms:creator orcid:0000-0003-3517-8071;
    npx:introduces sub:DDI;
    nt:wasCreatedFromProvenanceTemplate <http://purl.org/np/RANwQa4ICWS5SOjw7gp99nBpXBasapwtZF1fIM3H2gYTM>;
    nt:wasCreatedFromPubinfoTemplate <http://purl.org/np/RAA2MfqdBCzmz9yVWjKLXNbyfBNcwsMmOqcNUxkk1maIM>;
    nt:wasCreatedFromTemplate <http://purl.org/np/RAHvHX5qjbdnYXsZWsRMO3KuFekGUFR6LuPjigZns9_VA> .
}