@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 ; schema:title "Date and time parameters"; gen:hasContent """

A literal placeholder is substituted as an untyped string, so comparing one against a typed value such as dct:created silently matches nothing: an untyped string and an xsd:dateTime are not comparable in SPARQL.

Cast the placeholder explicitly wherever it is compared:

filter(?date >= xsd:dateTime(?_startDate))

The value passed by the caller must then be a full ISO 8601 date and time, for example 2026-03-01T00:00:00Z. A bare date such as 2026-03-01 makes the cast fail.

"""; gen:hasPositionString "01.06" . } sub:provenance { sub:assertion prov:wasAttributedTo . } sub:pubinfo { this: dct:created "2026-09-09T14:46:50Z"^^xsd:dateTime; dct:creator ; dct:license ; npx:introduces sub:paragraph; rdfs:label "Date and time parameters"; 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 "bHE6+MryXh3uLUkWBeIMnTWjm6QeY6prta7I2yWQdSP2xmHGQfV+PQAmYCIAUHUUykMzN8TMDMoQERInvJeCvgsyRGbGa4EfV/BeNETqAkMohsNzyNdat3sgDTsCiKvtL3HEIJ5mUK7qX3A04WAAs/03XWQewV/T5Dh4hMWkU8ke0Vk7byPYQzsCIXg9kL8SGC+MLwZQDgT7xdW4G17bxeaRRU/NwQsJocg6pgET+DKCLYM1/ZaD5mvw4P+fA1eSUoi5MuZqyJeVi1k0ZI6QaKbKjLZCRxm8ZDkUqD1TwQ2QyjwtkyzCM0lxhlA3AO+2SDmD8Y4nnESUBoP2HjuqgQ=="; npx:hasSignatureTarget this:; npx:signedBy . }