MarkLogic

MarkLogic is an enterprise-grade multi-model database platform developed by MarkLogic Corporation. It combines a document-oriented store for XML and JSON with a built-in search engine and, optionally, a semantic layer for RDF data, enabling unified management of various data types and rapid, scalable querying for complex workloads.

The database stores data as documents in a distributed, highly available architecture. It supports both schema-less and schema-defined approaches, with automatic indexing and powerful query capabilities, including text, geospatial, and structured queries. The RDF triple store and SPARQL support enable knowledge graphs and semantic queries.

Query languages and APIs: MarkLogic provides XQuery and SPARQL as query languages, while developers can work with JavaScript for application logic. It exposes REST APIs and client libraries for Java, Node.js, Python, and .NET, enabling integration with a range of ecosystems.

Key features include ACID transactions across a distributed cluster, multi-region replication for resilience, built-in security with role-based access control and element-level permissions, and advanced data governance tools. It offers robust indexing, text search, geospatial search, and event-driven processing via triggers and on-commit updates.

Deployment and use cases: MarkLogic runs on premises or in the cloud, including containerized deployments and cloud marketplaces. It is used for content management, data hubs and data integration, regulatory compliance, knowledge graphs, and search-centric applications in finance, government, healthcare, and life sciences.