. . . . . "Date and time parameters" . . "

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.

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Cast the placeholder explicitly wherever it is compared:

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

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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.

" . "01.06" . . "2026-09-09T14:46:50Z"^^ . . . . "Date and time parameters" . . . . . "RSA" . "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAl8cMusqtNyKA6UIsi3f7BAcZmHQXWxU0qk0PLsboMWQxYrGBfGgHTgRHJrBRxL+Zn9kJHKVmz2smDcjCBptXi/OwWy80gjsx+Pbe6IWz3zFPWF1UoFIKfPnC0slV67CQgdM853zW7Bmk9/uflCtK4EtZKmPdRGtUHVC7DTVvDBMDzLRGdE2KCBVN29EbM5GGVNvijYbaZQ9OFQPBkQshayqSIyGRr6rreJdkrRVLIzu3uuAjKYydaeXZWSN2JLnVBwrClKUxaEdCwhb5nXpMtKOMD+R+LgaXLeJUWM8BdRSYnta9ZqI5pHY4y3v+eW7J+HHeTvRbHvlik+Z4hFUXmQIDAQAB" . "bHE6+MryXh3uLUkWBeIMnTWjm6QeY6prta7I2yWQdSP2xmHGQfV+PQAmYCIAUHUUykMzN8TMDMoQERInvJeCvgsyRGbGa4EfV/BeNETqAkMohsNzyNdat3sgDTsCiKvtL3HEIJ5mUK7qX3A04WAAs/03XWQewV/T5Dh4hMWkU8ke0Vk7byPYQzsCIXg9kL8SGC+MLwZQDgT7xdW4G17bxeaRRU/NwQsJocg6pgET+DKCLYM1/ZaD5mvw4P+fA1eSUoi5MuZqyJeVi1k0ZI6QaKbKjLZCRxm8ZDkUqD1TwQ2QyjwtkyzCM0lxhlA3AO+2SDmD8Y4nnESUBoP2HjuqgQ==" . . .