@prefix this: <http://purl.org/np/RAKPouBbpsZPzpZPyqjAaVYyO5c-p-p5zJKknaovCeTHQ> .
@prefix sub: <http://purl.org/np/RAKPouBbpsZPzpZPyqjAaVYyO5c-p-p5zJKknaovCeTHQ#> .
@prefix schema: <https://schema.org/> .
@prefix bpmn: <http://dkm.fbk.eu/index.php/BPMN2_Ontology#> .
@prefix np: <http://www.nanopub.org/nschema#> .
@prefix dc1: <http://purl.org/dc/terms/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix npx: <http://purl.org/nanopub/x/> .
@prefix pplan: <http://purl.org/net/p-plan#> .
@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#> .

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

sub:assertion {
  sub:LinguisticSystem a schema:ComputerLanguage;
    rdfs:label "python";
    rdfs:seeAlso <https://www.wikidata.org/wiki/Q28865>;
    owl:versionInfo "3.7.9.final.0" .
  
  sub:gray_img a pplan:Variable;
    rdfs:comment "None";
    rdfs:label "gray_img" .
  
  sub:out1 a pplan:Variable;
    rdfs:comment "None";
    rdfs:label "out1" .
  
  sub:step dc1:description """@is_fairstep(label='Invert the grayscale image to get a negative')
def inverter(gray_img): return 255-gray_img
""";
    dc1:language sub:LinguisticSystem;
    pplan:hasInputVar sub:gray_img;
    pplan:hasOutputVar sub:out1;
    a bpmn:ScriptTask, pplan:Step;
    rdfs:label "Invert the grayscale image to get a negative" .
}

sub:provenance {
  sub:assertion prov:generatedAtTime "2021-06-14T14:21:54.545218"^^xsd:dateTime .
}

sub:pubInfo {
  sub:sig npx:hasAlgorithm "RSA";
    npx:hasPublicKey "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCD0/NXW4aH07lWeqN00hKVsQFT8IArmlwRKAY8IFGV9ijOcjMkxlyXUp3v6tin5/cC4/HgVcv8mEPdCTbIFbnyLf1KmEgLvWs7SE7wIpQFhG79ptwaH3AVfP+BxIZyCXpTIGAV3Fu56yNEyn4nZZELS03O20D9WXDVD7le3RKzUQIDAQAB";
    npx:hasSignature "GEKFtpB5c7Uo/ZrrwRSS0lQVAPcHb1r6vDreNt9rTxcJFed+pyGozBltINV3ugFHNKJ6bcmcyuseOdL1VW285YfO+2am4vGqEPXrwfgyQp5UbxXjjdLjwzYmSi4IbjKhv80MtosFG/RRVgJ8lnlS8MQWmZtm53q3QfHUil6v4dE=";
    npx:hasSignatureTarget this: .
  
  this: npx:introduces sub:step;
    prov:generatedAtTime "2021-06-14T14:21:54.545218"^^xsd:dateTime;
    prov:wasAttributedTo <https://orcid.org/0000-0000-0000-0000> .
}