Cordra is an open source system for managing digital objects with resolvable identifiers at scale. It is based on the [[Digital Object Architecture (DOA)]]. Cordra can be deployed as a single instance or as a distributed system. It is neither a database or an index:
Cordra offers a unified programmable interface across your storage system and indexing system, and manages information logically as digital objects. Digital objects are typed, and Cordra enforces schemas on user-supplied JSON information.
- Configurability. Schemas, business rules, access controls, and much more can be configured using settings and lifecycle hooks, all using the built-in admin interface.
- Data Consistency. Enables robust internal machinery to withstand partial system/network failures to ensure consistent system states between storage and indexing services.
- Scalability. Enables horizontal scaling and concurrency techniques to support large-scale demand. Provides a load-sharing front to backend services.
- APIs. Provides REST, DOIP, and IRP interfaces. REST APIs reduce the entry barrier. DOIP operations allow extensibility and interoperability. IRP enables identifier resolution.
- PKI and Hashing. Server and client authentications can be handled via PKI in addition to passwords. Digital objects can be hashed and linked for ensuring integrity