CASTORE (CApitalization & STORagE) takes place in a user-centered design approach to build an open archive platform, planned to create institutional repositories, managed by librarians in their respective institutions. With this system, the authors are able to store, convert (XML), fully index, manage, perpetuate, valorize, and distribute their digital documents. It uses an assembly of components (Tomcat, OO, JDO, Saxon, Lucene, etc.) to build middleware applications, relying on XML and any relational database. The system has been developed with a component architecture (J2EE) to be able to integrate the platform with any intranet environment with the minimum cost of development.