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;;; -*- mode: lisp; coding: utf-8; -*-
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;; Unfortunately xindy is out-of-the-box hyperref-incompatible. This
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;; configuration is a workaround, which requires to pass option
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;; hyperindex=false to hyperref.
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;; textit and emph not currently used, spxpagem replaces former textbf
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(define-attributes (("textbf" "textit" "emph" "spxpagem" "default")))
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(markup-locref :open "\textbf{\hyperpage{" :close "}}" :attr "textbf")
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(markup-locref :open "\textit{\hyperpage{" :close "}}" :attr "textit")
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(markup-locref :open "\emph{\hyperpage{" :close "}}" :attr "emph")
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(markup-locref :open "\spxpagem{\hyperpage{" :close "}}" :attr "spxpagem")
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(markup-locref :open "\hyperpage{" :close "}" :attr "default")
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(require "numeric-sort.xdy")
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;; xindy base module latex.xdy loads tex.xdy and the latter instructs
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;; xindy to ignore **all** TeX macros in .idx entries, except those
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;; explicitely described in merge rule. But when after applying all
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;; merge rules an empty string results, xindy raises an error:
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;; ERROR: CHAR: index 0 should be less than the length of the string
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;; For example when using pdflatex with utf-8 characters the index
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;; file will contain \IeC macros and they will get ignored except if
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;; suitable merge rules are loaded early. The texindy script coming
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;; with xindy provides this, but only for Latin scripts. The texindy
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;; man page says to use rather xelatex or lualatex in case of Cyrillic
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;; scripts.
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;; Sphinx contributes LICRcyr2utf8.xdy to provide support for Cyrillic
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;; scripts for the pdflatex engine.
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;; Another issue caused by xindy ignoring all TeX macros except those
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;; explicitely declared reveals itself when attempting to index ">>>",
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;; as the ">" is converted to "\textgreater{}" by Sphinx's LaTeX
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;; escaping.
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;; To fix this, Sphinx does **not** use texindy, and does not even
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;; load the xindy latex.xdy base module.
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;(require "latex.xdy")
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;; Rather it incorporates some suitable extracts from latex.xdy and
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;; tex.xdy with additional Sphinx contributed rules.
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;; But, this means for pdflatex and Latin scripts that the xindy file
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;; tex/inputenc/uf8.xdy is not usable because it refers to the macro
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;; \IeC only sporadically, and as tex.xdy is not loaded, a rule such as
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;; (merge-rule "\'e" "é" :string)
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;; does not work, it must be
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;; (merge-rule "\IeC {\'e}" "é" :string)
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;; So Sphinx contributes LICRlatin2utf8.xdy to mitigate that problem.
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;;;;;;;; extracts from tex.xdy (discarding most original comments):
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;;;
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;;; TeX conventions
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;;;
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;; Discard leading and trailing white space. Collapse multiple white
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;; space characters to blank.
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(merge-rule "^ +" "" :eregexp)
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(merge-rule " +$" "" :eregexp)
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(merge-rule " +" " " :eregexp)
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;; Handle TeX markup
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(merge-rule "\\([{}$%&#])" "\1" :eregexp)
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;;;;;;;; end of extracts from xindy's tex.xdy
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;;;;;;;; extracts from latex.xdy:
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;; Standard location classes: arabic and roman numbers, and alphabets.
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(define-location-class "arabic-page-numbers" ("arabic-numbers"))
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(define-location-class "roman-page-numbers" ("roman-numbers-lowercase"))
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(define-location-class "Roman-page-numbers" ("roman-numbers-uppercase"))
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(define-location-class "alpha-page-numbers" ("alpha"))
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(define-location-class "Alpha-page-numbers" ("ALPHA"))
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;; Output Markup
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(markup-letter-group-list :sep "~n~n \indexspace~n")
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(markup-indexentry :open "~n \item " :depth 0)
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(markup-indexentry :open "~n \subitem " :depth 1)
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(markup-indexentry :open "~n \subsubitem " :depth 2)
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(markup-locclass-list :open ", " :sep ", ")
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(markup-locref-list :sep ", ")
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;;;;;;;; end of extracts from latex.xdy
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;; The LaTeX \index command turns \ into normal character so the TeX macros
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;; written to .idx files are not followed by a blank. This is different
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;; from non-ascii letters which end up (with pdflatex) as \IeC macros in .idx
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;; file, with a blank space after \IeC
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;; Details of the syntax are explained at
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;; http://xindy.sourceforge.net/doc/manual-3.html
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;; In absence of :string, "xindy uses an auto-detection mechanism to decide,
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;; if the pattern is a regular expression or not". But it is not obvious to
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;; guess, for example "\\_" is not detected as RE but "\\P\{\}" is, so for
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;; being sure we apply the :string switch everywhere and do not use \\ etc...
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;; Go back from sphinx.util.texescape TeX macros to UTF-8
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(merge-rule "\sphinxleftcurlybrace{}" "{" :string)
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(merge-rule "\sphinxrightcurlybrace{}" "}" :string)
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(merge-rule "\_" "_" :string)
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(merge-rule "{[}" "[" :string)
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(merge-rule "{]}" "]" :string)
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(merge-rule "\textbackslash{}" "\" :string) ; " for Emacs syntax highlighting
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(merge-rule "\textasciitilde{}" "~~" :string); the ~~ escape is needed here
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(merge-rule "\textasciicircum{}" "^" :string)
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(merge-rule "\sphinxhyphen{}" "-" :string)
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(merge-rule "\textquotesingle{}" "'" :string)
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(merge-rule "\textasciigrave{}" "`" :string)
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(merge-rule "\textless{}" "<" :string)
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(merge-rule "\textgreater{}" ">" :string)
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(merge-rule "\P{}" "¶" :string)
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(merge-rule "\S{}" "§" :string)
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(merge-rule "\texteuro{}" "€" :string)
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(merge-rule "\(\infty\)" "∞" :string)
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(merge-rule "\(\pm\)" "±" :string)
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(merge-rule "\(\rightarrow\)" "→" :string)
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(merge-rule "\(\checkmark\)" "✓" :string)
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(merge-rule "\textendash{}" "–" :string)
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(merge-rule "\textbar{}" "|" :string)
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(merge-rule "\(\sp{\text{0}}\)" "⁰" :string)
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(merge-rule "\(\sp{\text{1}}\)" "¹" :string)
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(merge-rule "\(\sp{\text{2}}\)" "²" :string)
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(merge-rule "\(\sp{\text{3}}\)" "³" :string)
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(merge-rule "\(\sp{\text{4}}\)" "⁴" :string)
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(merge-rule "\(\sp{\text{5}}\)" "⁵" :string)
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(merge-rule "\(\sp{\text{6}}\)" "⁶" :string)
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(merge-rule "\(\sp{\text{7}}\)" "⁷" :string)
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(merge-rule "\(\sp{\text{8}}\)" "⁸" :string)
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(merge-rule "\(\sp{\text{9}}\)" "⁹" :string)
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(merge-rule "\(\sb{\text{0}}\)" "₀" :string)
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(merge-rule "\(\sb{\text{1}}\)" "₁" :string)
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(merge-rule "\(\sb{\text{2}}\)" "₂" :string)
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(merge-rule "\(\sb{\text{3}}\)" "₃" :string)
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(merge-rule "\(\sb{\text{4}}\)" "₄" :string)
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(merge-rule "\(\sb{\text{5}}\)" "₅" :string)
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(merge-rule "\(\sb{\text{6}}\)" "₆" :string)
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(merge-rule "\(\sb{\text{7}}\)" "₇" :string)
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(merge-rule "\(\sb{\text{8}}\)" "₈" :string)
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(merge-rule "\(\sb{\text{9}}\)" "₉" :string)
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(merge-rule "\IeC {\textalpha }" "α" :string)
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(merge-rule "\IeC {\textbeta }" "β" :string)
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(merge-rule "\IeC {\textgamma }" "γ" :string)
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(merge-rule "\IeC {\textdelta }" "δ" :string)
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(merge-rule "\IeC {\textepsilon }" "ε" :string)
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(merge-rule "\IeC {\textzeta }" "ζ" :string)
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(merge-rule "\IeC {\texteta }" "η" :string)
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(merge-rule "\IeC {\texttheta }" "θ" :string)
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(merge-rule "\IeC {\textiota }" "ι" :string)
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(merge-rule "\IeC {\textkappa }" "κ" :string)
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(merge-rule "\IeC {\textlambda }" "λ" :string)
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(merge-rule "\IeC {\textmu }" "μ" :string)
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(merge-rule "\IeC {\textnu }" "ν" :string)
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(merge-rule "\IeC {\textxi }" "ξ" :string)
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(merge-rule "\IeC {\textomicron }" "ο" :string)
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(merge-rule "\IeC {\textpi }" "π" :string)
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(merge-rule "\IeC {\textrho }" "ρ" :string)
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(merge-rule "\IeC {\textsigma }" "σ" :string)
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(merge-rule "\IeC {\texttau }" "τ" :string)
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(merge-rule "\IeC {\textupsilon }" "υ" :string)
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(merge-rule "\IeC {\textphi }" "φ" :string)
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(merge-rule "\IeC {\textchi }" "χ" :string)
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(merge-rule "\IeC {\textpsi }" "ψ" :string)
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(merge-rule "\IeC {\textomega }" "ω" :string)
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(merge-rule "\IeC {\textAlpha }" "Α" :string)
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(merge-rule "\IeC {\textBeta }" "Β" :string)
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(merge-rule "\IeC {\textGamma }" "Γ" :string)
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(merge-rule "\IeC {\textDelta }" "Δ" :string)
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(merge-rule "\IeC {\textEpsilon }" "Ε" :string)
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(merge-rule "\IeC {\textZeta }" "Ζ" :string)
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(merge-rule "\IeC {\textEta }" "Η" :string)
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(merge-rule "\IeC {\textTheta }" "Θ" :string)
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(merge-rule "\IeC {\textIota }" "Ι" :string)
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(merge-rule "\IeC {\textKappa }" "Κ" :string)
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(merge-rule "\IeC {\textLambda }" "Λ" :string)
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(merge-rule "\IeC {\textMu }" "Μ" :string)
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(merge-rule "\IeC {\textNu }" "Ν" :string)
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(merge-rule "\IeC {\textTheta }" "Θ" :string)
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(merge-rule "\IeC {\textIota }" "Ι" :string)
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(merge-rule "\IeC {\textKappa }" "Κ" :string)
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(merge-rule "\IeC {\textLambda }" "Λ" :string)
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(merge-rule "\IeC {\textMu }" "Μ" :string)
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(merge-rule "\IeC {\textNu }" "Ν" :string)
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(merge-rule "\IeC {\textXi }" "Ξ" :string)
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(merge-rule "\IeC {\textOmicron }" "Ο" :string)
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(merge-rule "\IeC {\textPi }" "Π" :string)
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(merge-rule "\IeC {\textRho }" "Ρ" :string)
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(merge-rule "\IeC {\textSigma }" "Σ" :string)
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(merge-rule "\IeC {\textTau }" "Τ" :string)
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(merge-rule "\IeC {\textUpsilon }" "Υ" :string)
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(merge-rule "\IeC {\textPhi }" "Φ" :string)
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(merge-rule "\IeC {\textChi }" "Χ" :string)
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(merge-rule "\IeC {\textPsi }" "Ψ" :string)
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(merge-rule "\IeC {\textOmega }" "Ω" :string)
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(merge-rule "\IeC {\textohm }" "Ω" :string)
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;; This xindy module provides some basic support for "see"
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(require "makeindex.xdy")
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;; This creates one-letter headings and works fine with utf-8 letters.
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;; For Cyrillic with pdflatex works thanks to LICRcyr2utf8.xdy
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(require "latin-lettergroups.xdy")
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;; currently we don't (know how to easily) separate "Numbers" from
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;; "Symbols" with xindy as is the case with makeindex.
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(markup-index :open "\begin{sphinxtheindex}
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\let\lettergroup\sphinxstyleindexlettergroup
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\let\lettergroupDefault\sphinxstyleindexlettergroupDefault
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\let\spxpagem\sphinxstyleindexpagemain
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\let\spxentry\sphinxstyleindexentry
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\let\spxextra\sphinxstyleindexextra
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"
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:close "
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\end{sphinxtheindex}
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"
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:tree)
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