sub:assertion {
  dct:title rdfs:label "has the title" .
  sub:affiliation-organization a nt:RestrictedChoicePlaceholder ;
    rdfs:label "Select organization from above" ;
    nt:possibleValue sub:organization .
  sub:affiliation-person a nt:RestrictedChoicePlaceholder ;
    rdfs:label "Select author from above" ;
    nt:possibleValue sub:author .
  sub:article a nt:ExternalUriPlaceholder , nt:IntroducedResource ;
    rdfs:label "DOI of the article (starting with https://doi.org/10...)" .
  sub:article-type a nt:RestrictedChoicePlaceholder ;
    rdfs:label "The type of the article" ;
    nt:hasDefaultValue <http://purl.org/spar/fabio/ScholarlyWork> ;
    nt:hasRegex "https://doi.org/10.+" ;
    nt:possibleValue <http://purl.org/spar/fabio/InUsePaper> , <http://purl.org/spar/fabio/MethodsPaper> , <http://purl.org/spar/fabio/PositionPaper> , <http://purl.org/spar/fabio/ResearchPaper> , <http://purl.org/spar/fabio/ResourcePaper> , <http://purl.org/spar/fabio/ReviewPaper> , <http://purl.org/spar/fabio/ScholarlyWork> .
  sub:assertion dct:description "Such a nanopublication contains the main high-level metadata about a scholarly article, including title, authors, and links to other nanopublications." ;
    a nt:AssertionTemplate , nt:UnlistedTemplate ;
    rdfs:label "Describing core article metadata" ;
    nt:hasStatement sub:st01 , sub:st02 , sub:st10 , sub:st21 , sub:st31 , sub:st41 ;
    nt:hasTag "Journals" .
  sub:author a nt:ExternalUriPlaceholder ;
    rdfs:label "ORCID ID of the author (starting with https://orcid.org/...)" ;
    nt:hasRegex "https://orcid.org/[0-9]{4}-[0-9]{4}-[0-9]{4}-[0-9]{3}[0-9X]" .
  sub:author-email a nt:LiteralPlaceholder ;
    rdfs:label "email address of author" ;
    nt:hasRegex "[A-Za-z0-9._+\\-\\']+@[A-Za-z0-9.\\-]+\\.[A-Za-z]{2,}" .
  sub:author-name a nt:LiteralPlaceholder ;
    rdfs:label "full name of author" .
  sub:author-with-email a nt:RestrictedChoicePlaceholder ;
    rdfs:label "Select author to specify an email address for" ;
    nt:possibleValue sub:author .
  sub:organization a nt:UriPlaceholder ;
    rdfs:label "ROR identifier (https://ror.org/...) or short local URI suffix (e.g. \"stanford\")" .
  sub:organization-name rdfs:label "The name of the organization" ;
    nt:hasRegex "(https.//ror.org/[0-9a-z]+|[a-zA-Z0-9_\\-]+" .
  sub:st01 rdf:object sub:article-type ;
    rdf:predicate rdf:type ;
    rdf:subject sub:article .
  sub:st02 rdf:object sub:title ;
    rdf:predicate dct:title ;
    rdf:subject sub:article .
  sub:st10 a nt:GroupedStatement , nt:RepeatableStatement ;
    nt:hasStatement sub:st11 , sub:st12 , sub:st13 .
  sub:st11 rdf:object sub:author ;
    rdf:predicate pav:authoredBy ;
    rdf:subject sub:article .
  sub:st12 rdf:object <http://xmlns.com/foaf/0.1/Person> ;
    rdf:predicate rdf:type ;
    rdf:subject sub:author .
  sub:st13 rdf:object sub:author-name ;
    rdf:predicate <http://schema.org/name> ;
    rdf:subject sub:author .
  sub:st21 rdf:object sub:author-email ;
    rdf:predicate <http://schema.org/email> ;
    rdf:subject sub:author-with-email ;
    a nt:OptionalStatement , nt:RepeatableStatement .
  sub:st31 rdf:object sub:organization-name ;
    rdf:predicate <http://schema.org/name> ;
    rdf:subject sub:organization ;
    a nt:RepeatableStatement .
  sub:st41 rdf:object sub:affiliation-organization ;
    rdf:predicate <http://schema.org/affiliation> ;
    rdf:subject sub:affiliation-person ;
    a nt:RepeatableStatement .
  sub:title a nt:LiteralPlaceholder ;
    rdfs:label "The title of the article" .
  pav:authoredBy rdfs:label "is authored by" .
  <http://purl.org/spar/fabio/InUsePaper> rdfs:label "in-use paper - A scholarly work that describes applied and validated solutions such as software tools, systems or architectures that benefit from the use of the technology of a particular scholarly domain." .
  <http://purl.org/spar/fabio/MethodsPaper> rdfs:label "methods paper - A scholarly work detailing a method, procedure or experimental protocol employed in a particular scholarly domain." .
  <http://purl.org/spar/fabio/PositionPaper> rdfs:label "position paper - A scholarly work that reports a particular intellectual position or viewpoint regarding a particular scholarly topic." .
  <http://purl.org/spar/fabio/ResearchPaper> rdfs:label "research paper - A scholarly work that reports original research contributions addressing theoretical, analytical or experimental aspects of a particular scholarly domain." .
  <http://purl.org/spar/fabio/ResourcePaper> rdfs:label "resource paper - A scholarly work that describes resources developed to provide experimental materials or facilities, support a research hypothesis, to provide answers to a research question, or that have contributed to the generation of novel scientific work." .
  <http://purl.org/spar/fabio/ReviewPaper> rdfs:label "review paper - A scholarly work that surveys the state of the art of topics central to a particular subject or relating to a specific domain (e.g. the scope of a certain journal or conference)." .
  <http://purl.org/spar/fabio/ScholarlyWork> rdfs:label "scholarly work - A general term that includes all other listed types" .
  <http://schema.org/affiliation> rdfs:label "has the affiliation" .
  <http://schema.org/email> rdfs:label "has the email address" .
  <http://schema.org/name> rdfs:label "has the name" .
  rdf:type rdfs:label "is a" .
  <http://xmlns.com/foaf/0.1/Person> rdfs:label "person" .
}