BEL borrows some ideas from the semantic web that resources at a given location should be persistent. However, the BEL namespace file format contains a flag to signify namespaces that might change over time that is only very narrowly appropriate for custom terminologies as they are under development. These namespaces are not cached and are not listed.
Public namespaces are distributed by Fraunhofer SCAI on the Artifactory server.
BEL Commons is developed and maintained in an academic capacity by Charles Tapley Hoyt and Daniel Domingo-Fernández at the Fraunhofer SCAI Department of Bioinformatics with support from the IMI project, AETIONOMY. It is built on top of the open source project, PyBEL. Please feel free to contact us here to give us feedback or report any issues.