{
  "archive": "pdfa3b",
  "metadata": {
    "title": "Records office cover sheet RO-2026-004318",
    "author": "Olivier Pons",
    "subject": "An archival sheet carrying metadata of its own",
    "keywords": "archive, planning, retention",
    "producer": "hqf-pdf",
    "created": "2026-07-14T09:30:00+02:00",
    "modified": "2026-09-17T14:05:00+02:00",
    "schemas": [
      {
        "name": "Records Office Schema",
        "namespace": "https://hqf-pdf.example/ns/records/1.0/",
        "prefix": "rec",
        "properties": [
          {
            "name": "Reference",
            "value": "RO-2026-004318",
            "description": "The reference the records office files the dossier under",
            "value_type": "text",
            "category": "external"
          },
          {
            "name": "Department",
            "value": "Planning",
            "description": "The department the dossier came from",
            "value_type": "text",
            "category": "external"
          },
          {
            "name": "RetainUntil",
            "value": "2056-12-31T23:59:59+01:00",
            "description": "The date the dossier may be destroyed, and not before",
            "value_type": "date",
            "category": "internal"
          },
          {
            "name": "Classification",
            "value": "Public",
            "description": "How widely the dossier may be circulated",
            "value_type": "text",
            "category": "external"
          },
          {
            "name": "Sheets",
            "value": "1",
            "description": "How many sheets the dossier holds",
            "value_type": "integer",
            "category": "internal"
          }
        ]
      },
      {
        "name": "Loan Record Schema",
        "namespace": "https://hqf-pdf.example/ns/loans/1.0/",
        "prefix": "loan",
        "properties": [
          {
            "name": "Sealed",
            "value": "True",
            "description": "Whether the dossier left the office sealed",
            "value_type": "boolean"
          },
          {
            "name": "Format",
            "value": "application/pdf",
            "description": "The media type the dossier is lent in",
            "value_type": "mime_type"
          },
          {
            "name": "Custodian",
            "value": "HQF Development",
            "description": "Who holds the dossier while it is out",
            "value_type": "proper_name"
          },
          {
            "name": "ShelfMetres",
            "value": "1.5",
            "description": "How much shelf the dossier takes, in metres",
            "value_type": "real"
          },
          {
            "name": "Series",
            "value": "https://hqf-pdf.com/records/series/42",
            "description": "The series the dossier belongs to",
            "value_type": "uri"
          },
          {
            "name": "Catalogue",
            "value": "https://hqf-pdf.com/records/catalogue",
            "description": "Where the office's catalogue is read",
            "value_type": "url"
          },
          {
            "name": "Witnesses",
            "value": {
              "bag": [
                "Claire Martin",
                "Jan de Vries"
              ]
            },
            "description": "Who witnessed the loan",
            "value_type": {
              "bag": "proper_name"
            }
          },
          {
            "name": "Movements",
            "value": {
              "seq": [
                {
                  "structure": [
                    {
                      "field": "When",
                      "value": "2026-09-01"
                    },
                    {
                      "field": "Holder",
                      "value": "Claire Martin"
                    }
                  ]
                },
                {
                  "structure": [
                    {
                      "field": "When",
                      "value": "2026-09-17"
                    },
                    {
                      "field": "Holder",
                      "value": "HQF Development"
                    }
                  ]
                }
              ]
            },
            "description": "Each time the dossier changed hands, in order",
            "value_type": {
              "seq": {
                "name": "Movement",
                "namespace": "https://hqf-pdf.example/ns/loans/movement/1.0/",
                "prefix": "mvt",
                "description": "One change of hands of a dossier",
                "fields": [
                  {
                    "name": "When",
                    "value_type": "date",
                    "description": "The day the dossier changed hands"
                  },
                  {
                    "name": "Holder",
                    "value_type": "proper_name",
                    "description": "Who took the dossier"
                  }
                ]
              }
            }
          },
          {
            "name": "Conditions",
            "value": {
              "lang_alt": [
                {
                  "language": "x-default",
                  "text": "To be returned unopened by 31 December 2026"
                },
                {
                  "language": "fr",
                  "text": "À rendre sans l’ouvrir, au plus tard le 31 décembre 2026"
                },
                {
                  "language": "de",
                  "text": "Ungeöffnet bis zum 31. Dezember 2026 zurückzugeben"
                }
              ]
            },
            "description": "The conditions of the loan, in each language they were agreed in",
            "value_type": "lang_alt"
          }
        ]
      }
    ]
  },
  "items": [
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 742.0,
        "urx": 523.0,
        "ury": 780.0
      },
      "content": "Records office cover sheet",
      "font": "DejaVuSans",
      "font_size": 20.0,
      "space_after": 14.0,
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 651.0,
        "urx": 523.0,
        "ury": 742.0
      },
      "content": "The fields below are the records office's own. No part of the PDF standard knows what a retention date is, so the file explains itself: each field arrives in the metadata packet with its name, the way it is to be read, who it is written for, and what it means. An archival validator accepts them on that description, and refuses metadata that turns up without one.",
      "font": "DejaVuSans",
      "font_size": 10.5,
      "leading": 15.0,
      "align": "justify",
      "space_after": 16.0,
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 608.6,
        "urx": 523.0,
        "ury": 651.0
      },
      "content": "What the sheet says",
      "font": "DejaVuSans",
      "font_size": 12.0,
      "space_before": 20.0,
      "space_after": 8.0,
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 523.6,
        "urx": 523.0,
        "ury": 608.6
      },
      "content": "Reference\tRO-2026-004318\nDepartment\tPlanning\nRetainUntil\t2056-12-31T23:59:59+01:00\nClassification\tPublic\nSheets\t1",
      "font": "DejaVuSans",
      "font_size": 11.0,
      "leading": 17.0,
      "tabs": {
        "method": "ruler",
        "ruler": [
          150.0
        ]
      },
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 481.2,
        "urx": 523.0,
        "ury": 523.6
      },
      "content": "What the packet declares of each of them",
      "font": "DejaVuSans",
      "font_size": 12.0,
      "space_before": 20.0,
      "space_after": 8.0,
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 383.2,
        "urx": 523.0,
        "ury": 481.2
      },
      "content": "rec:Reference\tText · external · The reference the records office files the dossier under\nrec:Department\tText · external · The department the dossier came from\nrec:RetainUntil\tDate · internal · The date the dossier may be destroyed, and not before\nrec:Classification\tText · external · How widely the dossier may be circulated\nrec:Sheets\tInteger · internal · How many sheets the dossier holds",
      "font": "DejaVuSans",
      "font_size": 9.5,
      "leading": 14.0,
      "hanging_list": {
        "marker": 0.0,
        "body": 150.0
      },
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 326.2,
        "urx": 523.0,
        "ury": 383.2
      },
      "content": "Every value above is written twice: once on this page, and once in the packet a machine reads, under the prefix the schema names. Reading the file's metadata gives back this table, field for field.",
      "font": "DejaVuSans",
      "font_size": 9.0,
      "leading": 13.0,
      "space_before": 18.0,
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 742.0,
        "urx": 523.0,
        "ury": 780.0
      },
      "content": "What else a packet can carry",
      "font": "DejaVuSans",
      "font_size": 20.0,
      "space_after": 14.0,
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 636.0,
        "urx": 523.0,
        "ury": 742.0
      },
      "content": "A second schema, the loan record's, carries fields of the six other kinds a property may be read as, and two lists: the witnesses to the loan, in no particular order, and each change of hands, in order, which is a structure the packet describes field by field. The conditions of the loan are one text in three languages, each version marked with its language. The document states its keywords, when it changed and whether it was trapped, and this page carries a packet of its own.",
      "font": "DejaVuSans",
      "font_size": 10.5,
      "leading": 15.0,
      "align": "justify",
      "space_after": 16.0,
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 612.0,
        "urx": 523.0,
        "ury": 636.0
      },
      "content": "Declared in the namespace https://hqf-pdf.example/ns/loans/1.0/, under the prefix loan:",
      "font": "DejaVuSans",
      "font_size": 10.0,
      "leading": 14.0,
      "space_before": 10.0,
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 290.0,
        "urx": 523.0,
        "ury": 612.0
      },
      "content": "loan:Sealed\tTrue · Boolean · Whether the dossier left the office sealed\nloan:Format\tapplication/pdf · MIMEType · The media type the dossier is lent in\nloan:Custodian\tHQF Development · ProperName · Who holds the dossier while it is out\nloan:ShelfMetres\t1.5 · Real · How much shelf the dossier takes, in metres\nloan:Series\thttps://hqf-pdf.com/records/series/42 · URI · The series the dossier belongs to\nloan:Catalogue\thttps://hqf-pdf.com/records/catalogue · URL · Where the office's catalogue is read\nloan:Witnesses\tClaire Martin; Jan de Vries · bag ProperName · Who witnessed the loan\nloan:Movements\t2026-09-01, Claire Martin; 2026-09-17, HQF Development · seq Movement · Each time the dossier changed hands, in order\nloan:Conditions\tx-default: To be returned unopened by 31 December 2026; fr: À rendre sans l’ouvrir, au plus tard le 31 décembre 2026; de: Ungeöffnet bis zum 31. Dezember 2026 zurückzugeben · Lang Alt · The conditions of the loan, in each language they were agreed in\nMovement\tOne change of hands of a dossier\nmvt:When\tDate · The day the dossier changed hands\nmvt:Holder\tProperName · Who took the dossier",
      "font": "DejaVuSans",
      "font_size": 9.5,
      "leading": 14.0,
      "hanging_list": {
        "marker": 0.0,
        "body": 150.0
      },
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 252.0,
        "urx": 523.0,
        "ury": 290.0
      },
      "content": "The document's keywords: archive, planning, retention; it changed on 2026-09-17T14:05:00+02:00; trapped: not known.",
      "font": "DejaVuSans",
      "font_size": 10.0,
      "leading": 14.0,
      "space_before": 10.0,
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 214.0,
        "urx": 523.0,
        "ury": 252.0
      },
      "content": "That date as PDF writes it: D:20260917140500+02'00'; read back: 2026-09-17T14:05:00+02:00.",
      "font": "DejaVuSans",
      "font_size": 10.0,
      "leading": 14.0,
      "space_before": 10.0,
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 176.0,
        "urx": 523.0,
        "ury": 214.0
      },
      "content": "This page carries a packet of 2420 bytes of its own; the same facts claiming PDF/A-3b, PDF/UA-1 and PDF/X-4 would weigh 4885 bytes.",
      "font": "DejaVuSans",
      "font_size": 10.0,
      "leading": 14.0,
      "space_before": 10.0,
      "pages": [
        2
      ]
    }
  ],
  "page_metadata": [
    {
      "page": 2,
      "metadata": {
        "facts": {
          "title": "What else a packet can carry"
        }
      }
    }
  ]
}