tm (version 0.3-1)

readPDF: Read In a PDF Document

Description

Returns a function which reads in a portable document format (PDF) document extracting both its text and its meta data.

Usage

readPDF(...)

Arguments

...

Arguments for the generator function.

Value

• A function with the signature elem, language, load, id:
• elem
  A list with the two named elements content and uri. The first element must hold the document corpus to be read in, the second element must hold a call to the document corpus. The call is evaluated upon a request for load on demand.
• language
  A character giving the text's language.
• load
  A logical value indicating whether the document corpus should be immediately loaded into memory.
• id
  A character representing a unique identification string for the returned text document.
• The function returns a PlainTextDocument representing the text and meta data in 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.

Note that this PDF reader needs both the tools pdftotext and pdfinfo installed and accessable on your system.