anchor.diff:  Person,name,RDF::FOAF.name,l,,
   Person,projects,JERMVocab.isAssociatedWith,u,,
   Person,web_page,RDF::FOAF.homepage,l,URI.parse(item),compact
  +Person,rdf_seek_id,JERMVocab.seekID,l,URI.parse(item),
   Programme,assays,JERMVocab.hasItem,u,,
   Programme,studies,JERMVocab.hasItem,u,,
   Programme,investigations,JERMVocab.hasItem,u,,
  
positive.code: *,managers,RDF::SIOC.has_owner,u,,
  *,updated_at,RDF::DC.modified,l,item.to_datetime,
  *,latest_version,RDF::DC.hasVersion,u,,
  *,rdf_seek_id,JERMVocab.seekID,l,URI.parse(item),
  Assay,assay_type_uri,JERMVocab.hasType,u,,
  Assay,incoming,JERMVocab.hasInput,u,,
  Assay,outgoing,JERMVocab.hasOutput,u,,
  
negative.code: Project,people,JERMVocab.isAssociatedWith,u,,
  Project,programme,JERMVocab.isPartOf,u,,
  Project,web_page,JERMVocab.webLink,l,URI.parse(item),compact
  Project,rdf_seek_id,JERMVocab.seekID,l,URI.parse(item),
  Publication,projects,JERMVocab.itemProducedBy,u,,
  Publication,assays,JERMVocab.isPartOf,u,,
  Sop,assays,JERMVocab.isPartOf,u,,
  Sop,projects,JERMVocab.itemProducedBy,u,,
  Sop,rdf_seek_id,JERMVocab.seekID,l,URI.parse(item),
  Strain,assays,JERMVocab.isInvestigatedBy,u,,
  Strain,ncbi_uri,JERMVocab.NCBI_ID,l,URI.parse(item),compact
  Strain,provider_id,JERMVocab.externalSupplierID,l,,
  Study,assays,JERMVocab.hasPart,u,,
  Study,investigation,JERMVocab.isPartOf,u,,
  Study,projects,JERMVocab.itemProducedBy,u,,
  Study,rdf_seek_id,JERMVocab.seekID,l,URI.parse(item),
  