1.2.1. Overview

eXo Platform provides CMIS support using the xCMIS project and the Content Storage provider.

About CMIS

The CMIS standard aims at defining a common content management web services interface that can be applied in content repositories and bring about the interoperability across repositories. The formal specification of CMIS standard is approved by the Organization for the Advancement of Structured Information Standards (OASIS) technical committee, who drives the development, convergence and adoption of global information society. With CMIS, enterprises now can deploy systems independently, and create specialized applications running over a variety of content management systems.

To see the advantages of content interoperability and the significance of CMIS as a whole, it is necessary to learn about mutual targets which caused the appearance of specification first.

About xCMIS

The xCMIS project, which is initially contributed to the Open Source community by eXo Platform, is an Open Source implementation of the Content Management Interoperability Services (CMIS) specification. xCMIS supports all the features stated in the CMIS core definition and both REST AtomPub and Web Services (SOAP/WSDL) protocol bindings.


To learn more about xCMIS, visit:

About eXo CMIS

eXo CMIS is built on the top of xCMIS embedded in eXo Platform to expose the Content drives as the CMIS repositories. The CMIS features are implemented as a set of components deployed on the eXo Container using XML files to describe the service configuration.


SOAP protocol binding is not implemented in eXo CMIS.

Figure: How eXo CMIS works

The Content drives exposure is implemented as a Content storage provider to the xCMIS SPI. The storage provider uses mappings from the Content's ManageDriveService to actual JCR nodes. AtomPub bindings make Content structure available via CMIS standard API.

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