appInfoGroups information about applications which have acted upon
the MEI file.
editorialDeclUsed to provide details of editorial principles and practices
applied during the encoding of musical text.
projectDescProject-level meta-data describing the aim or purpose for which
the electronic file was encoded, funding agencies, etc. together with any other relevant
information concerning the process by which it was assembled or collected.
samplingDeclContains a prose description of the rationale and methods used in
sampling texts in the creation of a corpus or collection.