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GSID Syntax & Anatomy

Understanding the 15-character semantic identifier.

Every GSID is represented by a standardized 15-character string (including dot separators) that contains core semantic routing information:

DE01.340.000182
├── DE : Country Code (ISO 3166-1 alpha-2)
├── 01 : Registrar ID (2-digit unique issuer code)
├── 3 : Core Entity (1-digit Schema.org type mapping)
├── 40 : Semantic Block (2-digit industry/category context)
└── 000182 : Serial Number (6-digit unique record database ID)

Field Breakdown:

  • Country Code (2 characters): Identifies the geographical or legal jurisdiction of the entity based on the ISO 3166-1 alpha-2 standard (e.g., DE for Germany, FR for France).
  • Registrar ID (2 characters): A unique two-digit code assigned to the authorized registrar/platform that issued the ID.
  • Core Entity (1 character): Represents one of the 8 primary Schema.org parent classes (e.g., 1 for LocalBusiness, 3 for Product).
  • Semantic Block (2 characters): A thematic block (00-99) defining the specific occupational, industry, or category context.
  • Serial Number (6 characters): An incremental identifier unique within the specific registrar's database. In special cases, permission may be granted to extend this field to 7 characters (resulting in a total ID length of 16 characters) to accommodate larger databases.