Can Footnotes reside in another file?

Question

I want to know if is there a possibility/method/package, by which I can uniquely label all footnote positions in book.tex. And another file, footnote.tex, containing the footnotes and matching labels, which can be used for inserting footnotes?

Example:

blah blah blah\footnotemark{id1} blah blah\footnotemark{id2} in chap1.tex; \footnotetext{id1}{blah blah},\footnotetext{id2}{blah blah blah} in chap1foot.tex. When chap1.tex is ran I need \footnotetext{id1}{blah blah} to appear with footnote counter starting from 1 in each page.

Answer 1

I believe what you're looking for is the sepfootnotes package. Here is an example of its basic usage:

% to keep this example self-contained
% the file that contains the footnotes:
\RequirePackage{filecontents}
\begin{filecontents}{\jobname-notes.tex}
\Anotecontent{id1}{\label{id1}This is the footnote with id1.}
\Anotecontent{id2}{\label{id2}This is the footnote with id2.}
\Anotecontent{id3}{This is the footnote with id3.}
\end{filecontents}

\documentclass{scrartcl}
\usepackage{sepfootnotes}
% this defines new footnotes and the commands
%   \Anotecontent{<id>}{<text>}
%   \Anote{<id>}
% and a few more:
\newfootnotes{A}

% input the footnote definitions:
\input{\jobname-notes}

% just for this example:
\textheight=80pt

\begin{document}

A text\Anote{id1} with some footnotes\Anote{id2} to demonstrate how
`sepfootnotes' works.\footnotemark[\ref{id1}] In order to make
this\Anote{id3} a bit longer here's another\footnotemark[\ref{id2}]
sentence.

\end{document}