Function load_documents_schemas 

pub fn load_documents_schemas() -> Result<Value, Error>

The document type names are unchanged from v1 (see crate::v1::document_types), and so are every domain property’s position and the transient list, so domains written under v1 or v2 decode unchanged: preorderSalt stays declared, transient and no longer required, but nothing reads it. v3 replaces most of the domain create data trigger with schema keywords: normalizedLabel and normalizedParentDomainName are generated from their counterparts (generatedFrom), creatorRefersTo finds the creator’s own preorder of the name from an earlier block and deletes it (a findBy over the creator and the double SHA-256 of the normalized label, “.” and the normalized parent, with minimumAgeBlocks and consume, which needs the preorder to record $createdAtBlockHeight), and refuses it while another identity holds a valid preorder of the name from an earlier block (chooseFirst by creation height, a preorder counting when it holds the same hash with its owner’s id first), and the recordsIdentityIsOwner rule holds a new domain’s identity record to its owner. A preorder holds both hashes (nameHash, unique per owner and indexed with the creation height, and ownerNameHash) and lives an hour (ttl). The protocol upgrade deletes the v2 preorders and rebuilds the type. Domains can no longer be deleted (canBeDeleted: false). The parent domain checks stay in the create trigger.