Project Archive: Harland is no longer an active project, but we still welcome contacts about this technology.

We are exploring the use and implementation of a flexible attribute storage model for persistent application data.  By exploiting regularities in attribute usage we seek to provide excellent performance while offering a level of flexibility that enables new kinds of applications.

Harland is a persistent storage library for Java™ language programs an early prototype for experimentation with our flexible storage model

Harland provides

• persistent document objects that can hold application data in a dynamically-extensible set of named property values
• a query facility for retrieving these objects based on the values of their properties
• enforcement of application-supplied constraints
• automatic manipulation of a relational database for storage and query processing without a fixed schema for the application data

Harland documents

• API documentation for our storage model API (called Bantam)

Contact us

• we want to hear about potential applications, challenges, and opportunities for this technology
• please send questions and comments by email to harland-support@parc.xerox.com