Tweedoseschema

Tweedoseschema is a formal data modeling framework used to describe, validate, and exchange structured data across diverse systems. It defines a concise set of building blocks for representing entities, attributes, relationships, and constraints, with a focus on extensibility, modularity, and interoperability.

Its core concepts include types (primitive and composite), properties (attributes of entities), relationships (links between entities with directional semantics), constraints (cardinality, value ranges, and pattern restrictions), and namespaces or modules to isolate domain-specific vocabularies. Tweedoseschema supports multiple serialization formats such as JSON-based representations, YAML-like notation, and XML-inspired forms, allowing validators to check conformance against a declared schema.

Implementation and usage: it is used to describe metadata for digital archives, research datasets, and knowledge graphs, enabling consistent description across services and tools. It supports versioning, extension points, and compatibility mappings to other schema standards, aiding data integration and migration.

Example: a minimal model may include an entity Person with properties name (string) and birthDate (date), and an entity Organization with name and location. A relationship employedBy links Person to Organization and can specify startDate. An instance would reference these shapes with actual values.

Relation to other standards: tweedoseschema can be used alongside or mapped to JSON Schema, RDF Schema (RDFS), OWL, and XML Schema, depending on deployment needs. It is described in accompanying specification documents and has tooling for validation and transformation.