. . . . "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" . "2025-09-19T14:44:42.258+02:00"^^ . . . . . . . . . . . . . "RSA" . "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCwUtewGCpT5vIfXYE1bmf/Uqu1ojqnWdYxv+ySO80ul8Gu7m8KoyPAwuvaPj0lvPtHrg000qMmkxzKhYknEjq8v7EerxZNYp5B3/3+5ZpuWOYAs78UnQVjbHSmDdmryr4D4VvvNIiUmd0yxci47dTFUj4DvfHnGd6hVe5+goqdcwIDAQAB" . "bpdVoNdDRSdvBsnM5a7iNc8BQ94ovO2xFrrGGpoQ5tr5H6vEcNZipN/tJeXiOs1puAqHUDRo5a9+XT4cofDSpqTcra8z0K2l8XZcUIC5MNY/k8YgGPQFOZQ+9N0bKV+4unb0o75NYxc7HuUJvWKa5P88mx7q1gxW04Qu47mKTSo=" . . .