{
  "@context": "http://www.w3.org/ns/csvw",
  "url": "waldorf-housing-age-aggregate-2026.csv",
  "dc:title": "Waldorf residential year-built aggregate by ZIP, 2026",
  "dc:description": "Aggregate residential assessment-record counts for Waldorf premise ZIPs 20601, 20602, and 20603. Structure year is not roof age or condition.",
  "dc:publisher": {
    "schema:name": "WaldorfMD Roofing",
    "schema:url": "https://waldorfmdroofing.com/research/waldorf-housing-age/"
  },
  "dc:source": [
    "https://opendata.maryland.gov/Business-and-Economy/Charles-County-Real-Property-Assessments-Hidden-Pr/bjbs-4wm4",
    "https://data.census.gov/table/ACSDT1Y2024.B25034?g=160XX00US2481175"
  ],
  "tableSchema": {
    "columns": [
      { "name": "premise_zip", "titles": "Premise ZIP", "datatype": "string", "required": true },
      { "name": "residential_records", "titles": "Residential records", "datatype": "integer", "required": true },
      { "name": "known_year_built", "titles": "Known year built", "datatype": "integer", "required": true },
      { "name": "unknown_year_built", "titles": "Unknown year built", "datatype": "integer", "required": true },
      { "name": "built_1990_2009", "titles": "Built 1990 to 2009", "datatype": "integer", "required": true },
      { "name": "share_of_known_year_records", "titles": "Share of known-year records", "datatype": { "base": "decimal", "format": "0.0%" }, "required": true }
    ]
  }
}