"An Internet media type, originally called a 'MIME type' after MIME (Multipurpose Internet Mail Extensions, an Internet standard) and sometimes a 'Content-type' after the name of a header in several protocols whose value is such a type, is a two-part identifier for file formats on the Internet. The identifiers were originally defined in RFC 2046 for use in e-mail sent through SMTP, but their use has expanded to other protocols such as HTTP and SIP. A media type is composed of at least two parts: a type, a subtype, and one or more optional parameters." (Wikipedia)
mimeTypes has the following components:
Mime Types - MimeType Type
The type of media.
An archive created as a tar file might contain an image file (jpg) and an associated document file (pdf). The archive would have mimeTypeType "container" and the image and document files would each have mimeTypeType "file".
Mime Types - Mime Type
Media types assigned by the Internet Assigned Numbers Authority (IANA). While somewhat out of date and lacking the precision of file and encoding types, mime types are still used by browsers, email and other web applications.
The vocabulary is editable by the Administrator. All mime media types are not included in the vocabulary, only those expected in the RUcore repository. Other administrators will want to edit this list.