clarify licensing

git-svn-id: svn://tug.org/texlive/trunk@14010 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 140 insertions, 113 deletions

diff --git a/Master/texmf-dist/doc/fonts/ly1/ly1.txt b/Master/texmf-dist/doc/fonts/ly1/ly1.txt
index a70d0c12545..e000e69ff4e 100644
--- a/Master/texmf-dist/doc/fonts/ly1/ly1.txt
+++ b/Master/texmf-dist/doc/fonts/ly1/ly1.txt
@@ -3,110 +3,128 @@
   LaTeX support for `texnansi' encoding (LY1)
   ===========================================
 
+Installing
+==========
+
+1. Put the files
+
   ly1enc.def
-  texnansi.sty
-  ly1ptm.fd
-  ly1phv.fd
-  ly1pcr.fd
-  ly1.txt
-
-The files in this directory make known a new encoding `LY1'
-to LaTeX that corresponds to the `texnansi' encoding as used
-by default in the Y&Y TeX system. There is also an option
-to support the `ansinew' encoding that is the default encoding
-in Microsoft Windows.
+  texnansi,sty
+
+into the directory texmf/tex/latex/psnfssx of your TeX system.
+These are the files that make the LY1 encodimg known to LaTeX.
+
+2. Unpack the ZIP archive ly1-min.zip in the texmf directory
+of your TeX system.  Doing so will add the metrics and font
+definition files for the common Adobe Times/Helvetica/Courier
+`Standard PostScript' fonts, as well as font map files and an
+encoding vector for use with dvips.
+
+3. Add the map files ly1ptm.map, ly1phv.map and ly1pcr.map to
+your dvips setup and/or update the configuraton of other DVI
+drivers correspondingly.
+
+
+Usage
+=====
+
+The font encoding `LY1' corresponds to the `texnansi' encoding
+as used by default in the Y&Y TeX system.  There is also an
+option to support the `ansinew' encoding that is the default
+encoding in Microsoft Windows.
 
 The main file is ly1enc.def. This contains the declaration of
-the encoding. To use `texnansi' encoded fonts within LaTeX, typically
-you just need to add the line
+the encoding. To use `texnansi' encoded fonts within LaTeX, 
+typically you just need to add the line
 
-\usepackage[LY1]{fontenc}
+	\usepackage[LY1]{fontenc}
 
 to your document preamble.
 
-An alternative to the above line is to use the texnansi package
+An alternative to the above line is to use the `texnansi' package
 
-\usepackage{texnansi}
+	\usepackage{texnansi}
 
 This will call the fontenc package, as above, to set up the LY1
-encoding but then make further changes to the uppercase and lowercase
-tables.
-Note that LaTeX does not need these changes to correctly uppercase
-text as its \MakeUppercase and \MakeLowercase commands only require
-the uppercase and lower case codes of the letters a-z.
-
-So for most purposes it is better to use the call to fontenc rather
-than use the texnansi package. Then if you pass the file to a site
-using T1 (Cork) encoded fonts the line can more easily be changed to
-
-\usepackage[T1]{fontenc}
-
-The texnansi package has a package option `ansinew' which modifies
-the LY1 encoding to refer to that MS Windows encoding. However you
-should only do this if your TeX system can not reencode fonts to
-support T1 or texnansi. The `ansinew' treatment of the left quote
-` as a grave accent makes it rather unsuitable for TeX use, also it
-lacks several useful glyphs. However if you need to you can go:
-
-\usepackage[ansinew]{texnansi}
-
-The other possible reason for using the texnansi package relates
-to the use of the lowercase table in the hyphenation algorithm.
-This is described below, but it is unfortunately of necessity
-rather technical, and you may want to stop reading at that point.
-
-Having declared the LY1 encoding to LaTeX, LaTeX will need to know
-the fonts that are available in this encoding. This distribution
-includes ly1ptm.fd, ly1plv.fd and ly1pcr.fd which declare the
-common Adobe Times/Helvetica/Courier `Standard PostScript' fonts.
-If you install other text fonts you can make similar ly1XXX.fd files
-based on this model. The LaTeX support packages for MathTime and
-Lucida Bright contain suitable LY1 fd files for those fonts.
-Note that these LY1 `fd' files assume that you have kept the
-original font vendor's file names rather than renaming the fonts
-to the Standard TeX `Karl Berry' naming scheme. The choice
-of font naming scheme is however not connected to the choice of
-encoding.
-
-For each encoding LaTeX needs to know an `error font' which is its
-fall back in the case that the font substitution system can find
-nothing better to do. ly1enc.def specifies that the Error Font for
-LY1 is Adobe Times Roman. This font is freely available from many
-sources (for instance it is included with the Free Adobe Acrobat
-reader) and so it seems the best choice as the error font.
-If you do not have this, you may wish to edit the lines
+encoding but then make further changes to the uppercase and
+lowercase tables.  Note that LaTeX does not need these changes to
+correctly uppercase text as its \MakeUppercase and \MakeLowercase
+commands only require the uppercase and lower case codes of the
+letters a-z.
+
+So for most purposes it is better to use the call to fontenc
+rather than use the `texnansi' package.  Then, if you pass the
+file to a site using T1 (Cork) encoded fonts the line can more
+easily be changed to
+
+	\usepackage[T1]{fontenc}
+
+The texnansi package has a package option `ansinew' which
+modifies the LY1 encoding to refer to that MS Windows
+encoding.  However you should only do this if your TeX system
+can not reencode fonts to support T1 or LY1.  The `ansinew'
+treatment of the left quote ` as a grave accent makes it
+rather unsuitable for TeX use, also it lacks several useful
+glyphs.  However if you need to you can go:
+
+	\usepackage[ansinew]{texnansi}
+
+The other possible reason for using the `texnansi' package
+relates to the use of the lowercase table in the hyphenation
+algorithm.  This is described below, but it is unfortunately
+of necessity rather technical, and you may want to stop
+reading at that point.
+
+Having declared the LY1 encoding to LaTeX, LaTeX will need to
+know the fonts that are available in this encoding.  This
+distribution includes TeX metrics, font definition files and
+map files for the common Adobe Times/Helvetica/Courier
+`Standard PostScript' fonts.
+
+For each encoding LaTeX needs to know an `error font' which is
+its fall back in the case that the font substitution system
+can find nothing better to do.  ly1enc.def specifies that the
+Error Font for LY1 is Adobe Times-Roman.  Any PostScript
+interpreter must be able to provide Times-Roman, so it seems a
+good choice as the error font.  Yet you may wish to change
+this for any reason; just edit the lines
 
 \DeclareErrorFont{LY1}{ptm}{m}{n}{10}
 \DeclareFontSubstitution{LY1}{ptm}{m}{n}
 
-at the top of ly1enc.def to refer to some other font set.
-For example if you have Y&Y TeX's `Lucida' distribution
-You could change the two occurrences of {ptm} to {hlh}
-Which will make LaTeX fall back on Lucida Bright if all else
-fails. Note that the copyright is held on ly1enc.def.
-This is the only change you should make to that file.
+at the top of ly1enc.def to refer to some other font set.  For
+example if you have Y&Y TeX's `Lucida Bright' distribution You
+could change the two occurrences of {ptm} to {hlh} Which will
+make LaTeX fall back on Lucida Bright if all else fails.  Note
+that the copyright is held on ly1enc.def.  This is the only
+change you should make to that file.
+
+For more information on LY1 encoding and see Y&Y's WWW page:
 
+        <http://www.yandy.com/usely1.htm>
+        
 
 A Note on Lowercase Codes and Hyphenation Tables
 ================================================
 
-The lowercase table is used by TeX's hyphenation algorithm,
-so in principle one would need to change the lowercase table
-to match the encoding used. However, it should not be changed
+The lowercase table is used by TeX's hyphenation algorithm, so
+in principle one would need to change the lowercase table to
+match the encoding used.  However, it should not be changed
 mid paragraph as all words, whatever font encoding they are
-set in, are lowercased using the table current at the *end*
-of the paragraph before being checked for hyphenation.
-Because of these limitations in TeX's hyphenation algorithm,
-LaTeX does not support changing the lowercase table mid document,
-so if the texnansi package is used then the texnansi lowercase
-table will be used for all fonts (whether or not LY1 encoded)
-and conversely if it is not used, the T1 table will be used, even
-for LY1 encoded fonts. The reason why this problem is not more
-serious is that the majority of letters (as opposed to ligatures,
-and symbols) that occur in LY1 occur in the same place in T1.
-
-The only letters that might possibly appear in a hyphenation table
-that are in different positions in T1 and LY1 are:
+set in, are lowercased using the table current at the *end* of
+the paragraph before being checked for hyphenation.  Because
+of these limitations in TeX's hyphenation algorithm, LaTeX
+does not support changing the lowercase table mid document, so
+if the `texnansi' package is used then the `texnansi'
+lowercase table will be used for all fonts (whether or not LY1
+encoded) and conversely if it is not used, the T1 table will
+be used, even for LY1 encoded fonts.  The reason why this
+problem is not as serious as it may at first appear is that
+the majority of letters (as opposed to ligatures, and symbols)
+that occur in LY1 occur in the same place in T1.
+
+The only letters that might possibly appear in a hyphenation
+table that are in different positions in T1 and LY1 are:
 
 \oe  (low position OT1 high new)
 \ss  (low position OT1 high new)
@@ -119,40 +137,49 @@ that are in different positions in T1 and LY1 are:
 \"{y}
 
 
-It should be noted that for those symbols that occur twice in LY1,
-the `high' copy is used if it coincides with the position used
-in T1 (as in the case of \ae, \o) otherwise the `low' copy will
-be used which will coincide with the OT1 position (\oe, \ss).
-(Unless the setup for ansinew is enabled in which case the high
-position is always used.) 
-
-
-Fortunately most hyphenation files for Western European languages
-(I checked French, German and Danish) duplicate all the hyphenation
-patterns using these letters so that the tables work with  both T1 and
-OT1 (and hence LY1) encoded fonts. However if you are using a language
-that makes use of say, \ss, but the hyphenation patterns just refer to
-\ss as ^^ff then you will need to copy the hyphenation file and edit
-all occurences of ^^ff to refer to the new position; either 
+It should be noted that for those symbols that occur twice in
+LY1, the `high' copy is used if it coincides with the position
+used in T1 (as in the case of \ae, \o) otherwise the `low'
+copy will be used which will coincide with the OT1 position
+(\oe, \ss).  (Unless the setup for ansinew is enabled in which
+case the high position is always used.)
+
+Fortunately most hyphenation files for Western European
+languages (I checked French, German and Danish) duplicate all
+the hyphenation patterns using these letters so that the
+tables work with both T1 and OT1 (and hence LY1) encoded
+fonts.  However if you are using a language that makes use of
+say, \ss, but the hyphenation patterns just refer to \ss as
+^^ff then you will need to copy the hyphenation file and edit
+all occurences of ^^ff to refer to the new position; either
 ^^19 (for texnansi) or ^^df (for ansinew).
 
-The remaining letters that are in different positions, such as s caron,
-may be dealt with similarly, although they are mainly used in Eastern
-European languages. The LY1 encoding does not have as many glyphs
-for Eastern European languages as T1, so for those languages most likely
-this encoding is not suitable. (Of course TeX can produce all the
-accented letters required, but the hyphenation algorithm can not work
-with such constructed composites it can only work with composite letters
+The remaining letters that are in different positions, such as
+s caron, may be dealt with similarly, although they are mainly
+used in Eastern European languages.  The LY1 encoding does not
+have as many glyphs for Eastern European languages as T1, so
+for those languages most likely this encoding is not suitable.
+(Of course TeX can produce all the accented letters required,
+but the hyphenation algorithm can not work with such
+constructed composites it can only work with composite letters
 that actually occur in the font.)
 
-It would be a good thing if hyphenation tables did not refer to any
-explicit character positions using the ^^ab notation, but rather always
-accessed characters by control sequences such as \ss. This would allow
-the remapping to be done via inputting a file such as ly1enc.def
-rather than by editing the hyphenation file. However currently most of
-the publicly available hyphenation tables unfortunately do `hard wire'
-the T1 character codes in this way.
+It would be a good thing if hyphenation tables did not refer
+to any explicit character positions using the ^^ab notation,
+but rather always accessed characters by control sequences
+such as \ss.  This would allow the remapping to be done via
+inputting a file such as ly1enc.def rather than by editing the
+hyphenation file.  However currently most of the publicly
+available hyphenation tables unfortunately do `hard wire' the
+T1 character codes in this way.
 
 
 Copyright 1997  David Carlisle
+(Updated Feb. 2001 Walter Schmidt)
+
+
+All the files in this directory  may be redistributed and/or modified
+under the terms  of the LaTeX Project Public License 
+http://www.latex-project.org/lppl/
+either  version 1 of the License, or (at your option) any later version.