name: sample
file_type: sample_file
primary_key: [sample_accession]
doc: "Biological sample metadata, one row per sample"
extra_columns: true

fields:
  sample_accession:
    type: string
    required: true
    doc: "Unique sample identifier (SDRF source name)"
  organism:
    type: string
    required: true
    doc: "Species (e.g. Homo sapiens)"
  organism_part:
    type: string
    required: true
    doc: "Tissue or organ (e.g. Brain; Frontal cortex)"
  disease:
    type: string
    optional: true
    doc: "Disease state (omitted when absent from SDRF)"
  cell_line:
    type: string
    optional: true
    doc: "Cell line name (omitted when absent from SDRF)"
  cell_type:
    type: string
    optional: true
    doc: "Cell type (omitted when absent from SDRF)"
  sex:
    type: string
    optional: true
    doc: "Biological sex (omitted when absent from SDRF)"
  age:
    type: string
    optional: true
    doc: "Age of specimen (omitted when absent from SDRF)"
  developmental_stage:
    type: string
    optional: true
    doc: "Developmental stage (omitted when absent from SDRF)"
  ancestry:
    type: string
    optional: true
    doc: "Ancestry category (omitted when absent from SDRF)"
  individual:
    type: string
    optional: true
    doc: "Individual/patient identifier (omitted when absent from SDRF)"
  sample_description:
    type: string
    optional: true
    doc: "Free-text sample description (omitted when absent from SDRF)"