Return a function which reads in a text document without knowledge
about its internal structure and possible available metadata.
Usage
readPlain(...)
Arguments
...
Arguments for the generator function.
Value
A function with the signature elem, language, id:
elemA list with the named element content which
must hold the document to be read in.
languageA character vector giving the text's language.
idA character vector representing a unique
identification string for the returned text document.
The function returns a PlainTextDocument representing
content.
Details
Formally this function is a function generator, i.e., it returns a
function (which reads in a text document) with a well-defined
signature, but can access passed over arguments via lexical
scoping. This is especially useful for reader functions for complex
data structures which need a lot of configuration options.