# Re: [NTG-context] What's (in) a module?

`On Feb 15, 2005, at 5:32 PM, Hans Hagen wrote:`

`Thomas A.Schmitz wrote:`

1. What constitutes a module? I wrote a couple of definitions and put them in a file t-foo.tex. When I write "\input t-foo" in the preamble of my document, everything works fine (so the file is found by TeX). When I say \usemodule[t-foo] or \usemodule[foo], I get "system : no macros found in module foo" and, obviously, "undefined control sequence." So: is there any special form for a module? I'm very curious because I defined a set of similar macros in another module, and everything works fine.

did you run mktexlsr?
It's a file in my \$HOMETEXMF which doesn't have lsR files. I ran mktexlsr nevertheless, but to no avail. I really fail to understand...

2. Is it possible to use a certain encoding file, enco-bar.tex, for parts of a file only? Could one define a macro (in a module???) that would do something like \switchtoencoding[bar] and switch back to the file's default encoding afterwards?
`you're talking about font encodings?`

\definetypeface [PalatinoA] [rm] [serif] [palatino] [default] [encoding=texnansi]

\definetypeface [PalatinoB] [rm] [serif] [palatino] [default] [encoding=ec]

Yes, I'm talking about font encodings. For the utf greek stuff, I defined a file enco-agr to provide the named glyphs, which I call by adding \useencoding[agr]. But I just realized that this will only add these named files, not overload the other names in the default encoding, so I guess that's a non-problem after all.

I guess Adam was in touch with you. unicode vectors and modules for adding support for utf extended Greek are approaching completion. Maybe we can think where to put the stuff (five fonts at least). Maybe a CTAN/Context directory would be a good thing.

`Thanks`

`Thomas`

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