. . . . "Optional multi-placeholder test" . . . "Optional multi-placeholder test" . . "prefix rdfs: \r\nprefix np: \r\nprefix npa: \r\nprefix npx: \r\nprefix xsd: \r\nprefix dct: \r\n\r\nselect ?np ?label ?date where {\r\n graph npa:graph {\r\n values ?__type_multi_iri {}\r\n ?np npx:hasNanopubType ?_type_multi_iri .\r\n ?np npa:hasValidSignatureForPublicKeyHash ?pubkey .\r\n filter not exists { ?npx npx:invalidates ?np ; npa:hasValidSignatureForPublicKeyHash ?pubkey . }\r\n ?np dct:created ?date .\r\n optional { ?np rdfs:label ?label }\r\n }\r\n}\r\norder by desc(?date)\r\nlimit 100" . . "Tobias Kuhn" . "2025-09-19T14:41:26.657+02:00"^^ . . . . . . . . . . . "RSA" . "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCwUtewGCpT5vIfXYE1bmf/Uqu1ojqnWdYxv+ySO80ul8Gu7m8KoyPAwuvaPj0lvPtHrg000qMmkxzKhYknEjq8v7EerxZNYp5B3/3+5ZpuWOYAs78UnQVjbHSmDdmryr4D4VvvNIiUmd0yxci47dTFUj4DvfHnGd6hVe5+goqdcwIDAQAB" . "gflcW4MsgfDCpfXONnm8MuNcwJoPqld4xSdXIhsdEXipYJA+KHtc2hJsko0a8gXJrXrF2F3Po8HLcuI3kT+SJ9EFZepzyEdRGiq98jySVjKRnMjDYnRnGlXM9w3ZHhnUEAtHzV4zm23reBjgkYWZLNQxG56sf04WVaL1qfB78KA=" . . .