Each entity who publishes to or consumes from the registry must be registered. Entities attribute ownership and accountability to registries entries they publish – whether they consume or provide services.
Entities can be organized at the discretion of the owning entity such as by legal entities, geographically, divisional, etc. The top level entity must be a formal legal entity able to enter into contractual agreements.
Each registry entry is associated with one, and only one, Entity establishing direct ownership and accountability. Entities will be assigned a registry entity identifier that is used for attribution purposes in conjunction with the registry entry’s registry ID. Entities may choose to leverage public identifiers such as Moodys, Standard & Poors, D&B, etc.
Each Entity is linked to an industry classification using an independent industry classification taxonomy. Industries may participate in multiple industry categories and may use any combination of industry classification standards. Parent Entities are not required to fully represent the industry categories as defined by child Entities.
The principle of self-sovereign content within the SADAR Semantic Registry establishes that while the registry validates the overall structural schema and enforces mandatory fields, the participating entities exclusively populate, control, and maintain their own data.
Within the context of Entity Specifications, this self-sovereignty gives organizations the autonomy to define how they are represented in the agentic ecosystem. For example, the sub-entity hierarchy(such as designating subsidiaries, operating units, or departments) is entirely defined and structured by the entity itself, provided it uses the registry's controlled type vocabulary. Additionally, entities maintain sovereignty over optional business intelligence through a "Published Profile". This profile acts as a self-sovereign credibility signal—similar to a D&B or S&P entity card—allowing the entity to voluntarily publish details like employee ranges, revenue bands, certifications, and public identifiers strictly under its own authority, rather than acting as an independently verified data source.
In the context of Service Specifications, services are registered under an entity and carry their own unique identity, descriptions, and contact surfaces. While the entity has sovereignty over the content published about its capabilities, the registry enforces strict referential integrity to ensure the self-sovereign content aligns with the accountable owner. For example, while an entity can define specific pricing or net-payment terms for a service, the registry enforces that any payment method advertised by the service must be a strict subset of the active payment methods declared by its directly owning entity.
Crucially, the integrity of this self-sovereign content is cryptographically guaranteed. Entities sign their manifests locally using their private keys prior to upload. Because the registry functions solely as a tamper-evident directory, it only stores the manifest hash and signature for independent verification. It never holds the entity's private keys and has absolutely no ability to alter a manifest after submission, ensuring the entity's content remains truly self-sovereign.