Organization -
a group of people that come together to contribute to or participate in a federated data operation. Organizations can be hierarchical: an organization can contain or sponsor other organizations. Organizations can also aggregate or participate with other organizations in broader collaborations.
Data Collection - An aggregation of one or more datasets, possibly spanning many research projects or teams.
Repository - A data collection service that specializes in hosting data from many different research teams and projects.
Project Archive - A large collection of data resulting from a project that produces and publishes data over an extended period of time and made accessible through a common portal or interface.
Database - A collection of data that is not formally file-based but stored in a database system. Here, a database is not assumed to be relational and can be quite complex in structure.
Dataset -
a set of data (can be one or more separate files or other digital objects) that is unified by a common set of research goals and/or results. This is intended to be a single publishable unit of scientific output that might be described in a single journal article.
Service - A set of stand-alone services not associated with a particular collection of data but which can either operate on data or produce data. Such a resource might typically accessed either through a web-based portal, a suite of web services, or both.
Informational - A (web) site that aggregates useful information for research. The information is not generally machine-processable, but rather is intended for consumption by a human (e.g. via a web browser).