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(* $Id$ *)
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theory Symbols
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imports Pure
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begin
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chapter {* Standard Isabelle symbols \label{app:symbols} *}
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text {*
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Isabelle supports an infinite number of non-ASCII symbols, which are
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represented in source text as @{verbatim "\\"}@{verbatim "<"}@{text
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name}@{verbatim ">"} (where @{text name} may be any identifier). It
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is left to front-end tools how to present these symbols to the user.
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The collection of predefined standard symbols given below is
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available by default for Isabelle document output, due to
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appropriate definitions of @{verbatim "\\"}@{verbatim isasym}@{text
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name} for each @{verbatim "\\"}@{verbatim "<"}@{text name}@{verbatim
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">"} in the @{verbatim isabellesym.sty} file. Most of these symbols
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are displayed properly in Proof~General if used with the X-Symbol
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package.
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Moreover, any single symbol (or ASCII character) may be prefixed by
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@{verbatim "\\"}@{verbatim "<^sup>"}, for superscript and @{verbatim
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"\\"}@{verbatim "<^sub>"}, for subscript, such as @{verbatim
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"A\\"}@{verbatim "<^sup>\<star>"}, for @{text "A\<^sup>\<star>"} the alternative
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versions @{verbatim "\\"}@{verbatim "<^isub>"} and @{verbatim
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"\\"}@{verbatim "<^isup>"} are considered as quasi letters and may
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be used within identifiers. Sub- and superscripts that span a
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region of text are marked up with @{verbatim "\\"}@{verbatim
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"<^bsub>"}@{text "\<dots>"}@{verbatim "\\"}@{verbatim "<^esub>"}, and
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@{verbatim "\\"}@{verbatim "<^bsup>"}@{text "\<dots>"}@{verbatim
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"\\"}@{verbatim "<^esup>"} respectively. Furthermore, all ASCII
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characters and most other symbols may be printed in bold by
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prefixing @{verbatim "\\"}@{verbatim "<^bold>"} such as @{verbatim
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"\\"}@{verbatim "<^bold>\\"}@{verbatim "<alpha>"} for @{text
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"\<^bold>\<alpha>"}. Note that @{verbatim "\\"}@{verbatim "<^bold>"}, may
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\emph{not} be combined with sub- or superscripts for single symbols.
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Further details of Isabelle document preparation are covered in
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\chref{ch:present}.
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\begin{center}
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\begin{isabellebody}
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\input{syms}
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\end{isabellebody}
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\end{center}
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*}
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end |