MMT archives correspond to software projects and are used by MMT to provide project-oriented work flows for any language defined in MMT. They are the primary means to maintain and distribute MMT content.
MMT-archives are directory trees in which all human-written files should be contained in a folder called source. Besides the following folders of an archive have a special meaning to MMT:
| Folder | Content |
|---|---|
| source | the primary content of the archive in some format that MMT understands natively. |
| content | index of all modules (created by MMT when building the archive). |
| narration | index of all documents (created by MMT when building the archive). |
| relational | the relational index with respect to the MMT ontology (created by MMT when building the archive). |
| export | location for the results of exporters that produce auxiliary data from MMT content (created by MMT when running an exporter). |
| errors | holds error and log messages from running build targets (created by MMT when running any build targets). |
| META_INF | holds the MANIFEST.MF file identifying the directory tree as an archive to MMT. |
In addition there are the following optional folders:
| Folder | Content |
|---|---|
| scala | Contains content directly implemented in scala. |
| bin | Compilation target of the scala folder. |
Archives can be written in any syntax that MMT can understand natively or for which an importer is registered. The MMT IDE based on jEdit can be used well to write archives in MMT’s native text syntax. Alternatively, an MMT-plugin for Intellij is also available . The MMT build tool can be used to build MMT archives. This is necessary to make the content available to other MMT applications.
A number of MMT archives are described in the OAF section.
The Mathhub.info section details how MMT-archives can be installed from and published to the MathHub portal.