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    "content": [
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            "type": "text",
            "text": "# eqn(1) (man)\n\n**Summary:** eqn - format equations for troff or MathML\n\n**Synopsis:** eqn [-rvCNR] [-d xy] [-T name] [-M dir] [-f F] [-s n] [-p n] [-m n] [file ...]\n\n## Flags\n\n| Flag | Long | Arg | Description |\n|------|------|-----|-------------|\n| -d | — | — | tions. Any delim statements in the source file overrides this. |\n| -C | — | — | Also, the statement ‘delim on’ is not handled specially. |\n| -N | — | — | missing closing delimiters. |\n| -v | — | — |  |\n| -r | — | — |  |\n| -m | — | — | scripts to a smaller size than n. |\n| -T | — | — | name with a value of 1; eqnrc uses this to provide definitions appropriate for the output device. However, if the specif |\n| -M | — | — |  |\n| -R | — | — |  |\n| -f | — | — |  |\n| -s | — | — | sets equations at whatever the current point size is when the equation is encountered. |\n| -p | — | — | rounding text. This option is deprecated. Normally eqn sets subscripts and super‐ scripts at 70% of the size of the surr |\n\n## See Also\n\n- groff(1)\n- troff(1)\n- pic(1)\n- grofffont(5)\n\n## Section Outline\n\n- **NAME** (2 lines)\n- **SYNOPSIS** (2 lines)\n- **DESCRIPTION** (16 lines)\n- **OPTIONS** (2 lines) — 12 subsections\n  - -d (2 lines)\n  - -C (2 lines)\n  - -N (2 lines)\n  - -v (1 lines)\n  - -r (1 lines)\n  - -m (2 lines)\n  - -T (5 lines)\n  - -M (1 lines)\n  - -R (1 lines)\n  - -f (1 lines)\n  - -s (2 lines)\n  - -p (3 lines)\n- **USAGE** (11 lines) — 7 subsections\n  - Controlling delimiters (7 lines)\n  - Automatic spacing (35 lines)\n  - New primitives (115 lines)\n  - Extended primitives (13 lines)\n  - Customization (163 lines)\n  - Macros (28 lines)\n  - Fonts (18 lines)\n- **FILES** (3 lines)\n- **MATHML MODE LIMITATIONS** (22 lines)\n- **BUGS** (9 lines)\n- **SEE ALSO** (5 lines)\n\n## Full Content\n\n### NAME\n\neqn - format equations for troff or MathML\n\n### SYNOPSIS\n\neqn [-rvCNR] [-d xy] [-T name] [-M dir] [-f F] [-s n] [-p n] [-m n] [file ...]\n\n### DESCRIPTION\n\nThis  manual  page describes the GNU version of eqn, which is part of the groff document for‐\nmatting system.  eqn compiles descriptions of equations embedded  within  troff  input  files\ninto  commands that are understood by troff.  Normally, it should be invoked using the -e op‐\ntion of groff.  The syntax is quite compatible with Unix eqn.  The output of GNU  eqn  cannot\nbe  processed with Unix troff; it must be processed with GNU troff.  If no files are given on\nthe command line, the standard input is read.  A filename of - causes the standard  input  to\nbe read.\n\neqn  searches  for  the file eqnrc in the directories given with the -M option first, then in\n/usr/lib/groff/site-tmac, /usr/share/groff/site-tmac, and finally in the standard  macro  di‐\nrectory  /usr/share/groff/1.22.4/tmac.  If it exists, eqn processes it before the other input\nfiles.  The -R option prevents this.\n\nGNU eqn does not provide the functionality of neqn: it does not support low-resolution, type‐\nwriter-like devices (although it may work adequately for very simple input).\n\n### OPTIONS\n\nWhitespace is permitted between a command-line option and its argument.\n\n#### -d\n\ntions.  Any delim statements in the source file overrides this.\n\n#### -C\n\nAlso, the statement ‘delim on’ is not handled specially.\n\n#### -N\n\nmissing closing delimiters.\n\n#### -v\n\n#### -r\n\n#### -m\n\nscripts to a smaller size than n.\n\n#### -T\n\nname with a value of 1; eqnrc uses this to provide  definitions  appropriate  for  the\noutput  device.   However,  if  the specified device is “MathML”, the output is MathML\nmarkup rather than troff commands, and eqnrc is not loaded at all.  The default output\ndevice is ps.\n\n#### -M\n\n#### -R\n\n#### -f\n\n#### -s\n\nsets equations at whatever the current point size is when the equation is encountered.\n\n#### -p\n\nrounding  text.   This  option is deprecated.  Normally eqn sets subscripts and super‐\nscripts at 70% of the size of the surrounding text.\n\n### USAGE\n\nOnly the differences between GNU eqn and Unix eqn are described here.\n\nGNU eqn emits Presentation MathML output when invoked with the -T MathML option.\n\nGNU eqn sets the input token \"...\"  as three periods or low dots, rather than the three  cen‐\ntered dots of classic eqn.  To get three centered dots, write cdots or cdot cdot cdot.\n\nMost of the new features of the GNU eqn input language are based on TeX.  There are some ref‐\nerences to the differences between TeX and GNU eqn below; these may safely be ignored if  you\ndo not know TeX.\n\n#### Controlling delimiters\n\nIf not in compatibility mode, eqn recognizes\n\ndelim on\n\nto restore the delimiters which have been previously disabled with a call to ‘delim off’.  If\ndelimiters haven't been specified, the call has no effect.\n\n#### Automatic spacing\n\neqn gives each component of an equation a type, and adjusts the  spacing  between  components\nusing that type.  Possible types are described in the table below.\n\nordinary      an ordinary character such as ‘1’ or ‘x’\noperator      a large operator such as ‘Σ’\nbinary        a binary operator such as ‘+’\nrelation      a relation such as ‘=’\nopening       a opening bracket such as ‘(’\nclosing       a closing bracket such as ‘)’\npunctuation   a punctuation character such as ‘,’\ninner         a subformula contained within brackets\nsuppress      a type that suppresses automatic spacing adjustment\n\nComponents of an equation get a type in one of two ways.\n\ntype t e\nThis  yields an equation component that contains e but that has type t, where t is one\nof the types mentioned above.  For example, times is defined as\n\ntype \"binary\" \\(mu\n\nThe name of the type doesn't have to be quoted, but quoting protects from macro expan‐\nsion.\n\nchartype t text\nUnquoted groups of characters are split up into individual characters, and the type of\neach character is looked up; this changes the type that is stored for each  character;\nit says that the characters in text from now on have type t.  For example,\n\nchartype \"punctuation\" .,;:\n\nwould  make the characters ‘.,;:’ have type punctuation whenever they subsequently ap‐\npeared in an equation.  The type t can also be letter or digit; in these  cases  char‐‐\ntype changes the font type of the characters.  See subsection “Fonts” below.\n\n#### New primitives\n\nbig e  Enlarges  the expression it modifies; intended to have semantics like CSS ‘large’.  In\ntroff output, the point size is increased by 5; in MathML output, the expression uses\n\n<mstyle mathsize='big'>\n\ne1 smallover e2\nThis is similar to over; smallover reduces the size of e1 and e2; it  also  puts  less\nvertical  space between e1 or e2 and the fraction bar.  The over primitive corresponds\nto the TeX \\over primitive in display styles; smallover corresponds to \\over  in  non-\ndisplay styles.\n\nvcenter e\nThis vertically centers e about the math axis.  The math axis is the vertical position\nabout which characters such as ‘+’ and ‘−’ are centered; also it is the vertical posi‐\ntion used for the bar of fractions.  For example, sum is defined as\n\n{ type \"operator\" vcenter size +5 \\(*S }\n\n(Note that vcenter is silently ignored when generating MathML.)\n\ne1 accent e2\nThis  sets  e2  as an accent over e1.  e2 is assumed to be at the correct height for a\nlowercase letter; e2 is moved down according to whether e1 is taller or shorter than a\nlowercase letter.  For example, hat is defined as\n\naccent { \"^\" }\n\ndotdot, dot, tilde, vec, and dyad are also defined using the accent primitive.\n\ne1 uaccent e2\nThis  sets  e2 as an accent under e1.  e2 is assumed to be at the correct height for a\ncharacter without a descender; e2 is moved down if e1 has a descender.  utilde is pre-\ndefined using uaccent as a tilde accent below the baseline.\n\nsplit \"text\"\nThis has the same effect as simply\n\ntext\n\nbut  text is not subject to macro expansion because it is quoted; text is split up and\nthe spacing between individual characters is adjusted.\n\nnosplit text\nThis has the same effect as\n\n\"text\"\n\nbut because text is not quoted it is subject to macro expansion; text is not split  up\nand the spacing between individual characters is not adjusted.\n\ne opprime\nThis is a variant of prime that acts as an operator on e.  It produces a different re‐\nsult from prime in a case such as A opprime sub 1: with opprime the 1 is tucked  under\nthe  prime  as  a subscript to the A (as is conventional in mathematical typesetting),\nwhereas with prime the 1 is a subscript to the prime character.  The precedence of op‐‐\nprime  is  the  same as that of bar and under, which is higher than that of everything\nexcept accent and uaccent.  In unquoted text a ' that is not the  first  character  is\ntreated like opprime.\n\nspecial text e\nThis constructs a new object from e using a troff(1) macro named text.  When the macro\nis called, the string 0s contains the output for e, and the number registers  0w,  0h,\n0d, 0skern, and 0skew contain the width, height, depth, subscript kern, and skew of e.\n(The subscript kern of an object says how much a subscript on that  object  should  be\ntucked in; the skew of an object says how far to the right of the center of the object\nan accent over the object should be placed.)  The macro must modify 0s so that it out‐\nputs the desired result with its origin at the current point, and increase the current\nhorizontal position by the width of the object.  The number  registers  must  also  be\nmodified so that they correspond to the result.\n\nFor  example, suppose you wanted a construct that ‘cancels’ an expression by drawing a\ndiagonal line through it.\n\n.EQ\ndefine cancel 'special Ca'\n.EN\n.de Ca\n.  ds 0s \\\n\\Z'\\\\*(0s'\\\n\\v'\\\\n(0du'\\\n\\D'l \\\\n(0wu -\\\\n(0hu-\\\\n(0du'\\\n\\v'\\\\n(0hu'\n..\n\nThen you could cancel an expression e with cancel { e }\n\nHere's a more complicated construct that draws a box round an expression:\n\n.EQ\ndefine box 'special Bx'\n.EN\n.de Bx\n.  ds 0s \\\n\\Z'\\h'1n'\\\\*(0s'\\\n\\Z'\\\n\\v'\\\\n(0du+1n'\\\n\\D'l \\\\n(0wu+2n 0'\\\n\\D'l 0 -\\\\n(0hu-\\\\n(0du-2n'\\\n\\D'l -\\\\n(0wu-2n 0'\\\n\\D'l 0 \\\\n(0hu+\\\\n(0du+2n'\\\n'\\\n\\h'\\\\n(0wu+2n'\n.  nr 0w +2n\n.  nr 0d +1n\n.  nr 0h +1n\n..\n\nspace n\nA positive value of the integer n (in hundredths of an em) sets the  vertical  spacing\nbefore  the  equation, a negative value sets the spacing after the equation, replacing\nthe default values.  This primitive provides an interface to groff's  \\x  escape  (but\nwith opposite sign).\n\nThis keyword has no effect if the equation is part of a pic picture.\n\n#### Extended primitives\n\ncol n { ... }\nccol n { ... }\nlcol n { ... }\nrcol n { ... }\npile n { ... }\ncpile n { ... }\nlpile n { ... }\nrpile n { ... }\nThe  integer  value  n (in hundredths of an em) increases the vertical spacing between\nrows, using groff's \\x escape (the value has no effect in MathML mode).  Negative val‐\nues  are possible but have no effect.  If there is more than a single value given in a\nmatrix, the biggest one is used.\n\n#### Customization\n\nWhen eqn is generating troff markup, the appearance of equations is  controlled  by  a  large\nnumber of parameters.  They have no effect when generating MathML mode, which pushes typeset‐\nting and fine motions downstream to a MathML rendering engine.  These parameters can  be  set\nusing the set command.\n\nset p n\nThis sets parameter p to value n; n is an integer.  For example,\n\nset xheight 45\n\nsays that eqn should assume an x height of 0.45 ems.\n\nPossible parameters are as follows.  Values are in units of hundredths of an em unless\notherwise stated.  These descriptions are intended to be expository rather than defin‐\nitive.\n\nminimumsize\neqn  doesn't  set  anything at a smaller point-size than this.  The value is in\npoints.\n\nfatoffset\nThe fat primitive emboldens an equation by overprinting two copies of the equa‐\ntion  horizontally offset by this amount.  This parameter is not used in MathML\nmode; instead, fat text uses\n\n<mstyle mathvariant='double-struck'>\n\noverhang\nA fraction bar is longer by twice this amount than the maximum of the widths of\nthe  numerator  and denominator; in other words, it overhangs the numerator and\ndenominator by at least this amount.\n\naccentwidth\nWhen bar or under is applied to a single character,  the  line  is  this  long.\nNormally,  bar or under produces a line whose length is the width of the object\nto which it applies; in the case of a single character, this tends to produce a\nline that looks too long.\n\ndelimiterfactor\nExtensible  delimiters  produced with the left and right primitives have a com‐\nbined height and depth of at least this many thousandths of twice  the  maximum\namount  by which the sub-equation that the delimiters enclose extends away from\nthe axis.\n\ndelimitershortfall\nExtensible delimiters produced with the left and right primitives have  a  com‐\nbined height and depth not less than the difference of twice the maximum amount\nby which the sub-equation that the delimiters enclose  extends  away  from  the\naxis and this amount.\n\nnulldelimiterspace\nThis much horizontal space is inserted on each side of a fraction.\n\nscriptspace\nThe width of subscripts and superscripts is increased by this amount.\n\nthinspace\nThis amount of space is automatically inserted after punctuation characters.\n\nmediumspace\nThis  amount of space is automatically inserted on either side of binary opera‐\ntors.\n\nthickspace\nThis amount of space is automatically inserted on either side of relations.\n\nxheight\nThe height of lowercase letters without ascenders such as ‘x’.\n\naxisheight\nThe height above the baseline of the center of characters such as ‘+’ and  ‘−’.\nIt is important that this value is correct for the font you are using.\n\ndefaultrulethickness\nThis  should  set  to  the thickness of the \\(ru character, or the thickness of\nhorizontal lines produced with the \\D escape sequence.\n\nnum1   The over command shifts up the numerator by at least this amount.\n\nnum2   The smallover command shifts up the numerator by at least this amount.\n\ndenom1 The over command shifts down the denominator by at least this amount.\n\ndenom2 The smallover command shifts down the denominator by at least this amount.\n\nsup1   Normally superscripts are shifted up by at least this amount.\n\nsup2   Superscripts within superscripts or upper limits  or  numerators  of  smallover\nfractions  are  shifted  up by at least this amount.  This is usually less than\nsup1.\n\nsup3   Superscripts within denominators or square roots or subscripts or lower  limits\nare shifted up by at least this amount.  This is usually less than sup2.\n\nsub1   Subscripts are normally shifted down by at least this amount.\n\nsub2   When there is both a subscript and a superscript, the subscript is shifted down\nby at least this amount.\n\nsupdrop\nThe baseline of a superscript is no more than this much amount below the top of\nthe object on which the superscript is set.\n\nsubdrop\nThe  baseline  of a subscript is at least this much below the bottom of the ob‐\nject on which the subscript is set.\n\nbigopspacing1\nThe baseline of an upper limit is at least this much above the top of  the  ob‐\nject on which the limit is set.\n\nbigopspacing2\nThe baseline of a lower limit is at least this much below the bottom of the ob‐\nject on which the limit is set.\n\nbigopspacing3\nThe bottom of an upper limit is at least this much above the top of the  object\non which the limit is set.\n\nbigopspacing4\nThe  top  of a lower limit is at least this much below the bottom of the object\non which the limit is set.\n\nbigopspacing5\nThis much vertical space is added above and below limits.\n\nbaselinesep\nThe baselines of the rows in a pile or matrix are normally this far apart.   In\nmost cases this should be equal to the sum of num1 and denom1.\n\nshiftdown\nThe  midpoint  between  the top baseline and the bottom baseline in a matrix or\npile is shifted down by this much from the axis.  In most cases this should  be\nequal to axisheight.\n\ncolumnsep\nThis much space is added between columns in a matrix.\n\nmatrixsidesep\nThis much space is added at each side of a matrix.\n\ndrawlines\nIf  this is non-zero, lines are drawn using the \\D escape sequence, rather than\nwith the \\l escape sequence and the \\(ru character.\n\nbodyheight\nThe amount by which the height of the equation exceeds this is added  as  extra\nspace before the line containing the equation (using \\x).  The default value is\n85.\n\nbodydepth\nThe amount by which the depth of the equation exceeds this is  added  as  extra\nspace  after the line containing the equation (using \\x).  The default value is\n35.\n\nnroff  If this is non-zero, then ndefine behaves like define and tdefine  is  ignored,\notherwise  tdefine  behaves  like  define  and ndefine is ignored.  The default\nvalue is 0 (This is typically changed to 1 by the eqnrc  file  for  the  ascii,\nlatin1, utf8, and cp1047 devices.)\n\nA more precise description of the role of many of these parameters can be found in Ap‐\npendix H of The TeXbook.\n\n#### Macros\n\nMacros can take arguments.  In a macro body, $n where n is between 1 and 9,  is  replaced  by\nthe  nth argument if the macro is called with arguments; if there are fewer than n arguments,\nit is replaced by nothing.  A word containing a left parenthesis where the part of  the  word\nbefore  the  left  parenthesis  has  been defined using the define command is recognized as a\nmacro call with arguments; characters following the left parenthesis up to a  matching  right\nparenthesis are treated as comma-separated arguments; commas inside nested parentheses do not\nterminate an argument.\n\nsdefine name X anything X\nThis is like the define command, but name is not recognized if called with arguments.\n\ninclude \"file\"\ncopy \"file\"\nInclude the contents of file (include and copy are synonyms).  Lines of file beginning\nwith .EQ or .EN are ignored.\n\nifdef name X anything X\nIf  name has been defined by define (or has been automatically defined because name is\nthe output device) process anything; otherwise ignore anything.  X can be any  charac‐\nter not appearing in anything.\n\nundef name\nRemove definition of name, making it undefined.\n\nBesides  the  macros  mentioned  above, the following definitions are available: Alpha, Beta,\n..., Omega (this is the same as ALPHA, BETA, ..., OMEGA),  ldots  (three  dots  on  the  base\nline), and dollar.\n\n#### Fonts\n\neqn  normally  uses  at least two fonts to set an equation: an italic font for letters, and a\nroman font for everything else.  The existing gfont command changes the font that is used  as\nthe  italic  font.   By  default  this  is I.  The font that is used as the roman font can be\nchanged using the new grfont command.\n\ngrfont f\nSet the roman font to f.\n\nThe italic primitive uses the current italic font set by gfont; the roman primitive uses  the\ncurrent roman font set by grfont.  There is also a new gbfont command, which changes the font\nused by the bold primitive.  If you only use the roman, italic and bold primitives to changes\nfonts  within  an equation, you can change all the fonts used by your equations just by using\ngfont, grfont and gbfont commands.\n\nYou can control which characters are treated as letters (and therefore set in italics) by us‐\ning  the  chartype command described above.  A type of letter causes a character to be set in\nitalic type.  A type of digit causes a character to be set in roman type.\n\n### FILES\n\n/usr/share/groff/1.22.4/tmac/eqnrc\nInitialization file.\n\n### MATHML MODE LIMITATIONS\n\nMathML is designed on the assumption that it cannot know the exact  physical  characteristics\nof  the  media and devices on which it will be rendered.  It does not support fine control of\nmotions and sizes to the same degree troff does.  Thus:\n\n*      eqn parameters have no effect on the generated MathML.\n\n*      The special, up, down, fwd, and back operations cannot be  implemented,  and  yield  a\nMathML ‘<merror>’ message instead.\n\n*      The  vcenter  keyword is silently ignored, as centering on the math axis is the MathML\ndefault.\n\n*      Characters that eqn over troff sets extra large – notably the integral sign – may  ap‐\npear too small and need to have their ‘<mstyle>’ wrappers adjusted by hand.\n\nAs  in its troff mode, eqn in MathML mode leaves the .EQ and .EN delimiters in place for dis‐\nplayed equations, but emits no explicit delimiters around inline equations.  They  can,  how‐\never,  be  recognized  as  strings that begin with ‘<math>’ and end with ‘</math>’ and do not\ncross line boundaries.\n\nSee section “Bugs” below for translation limits specific to eqn.\n\n### BUGS\n\nInline equations are set at the point size that is current at  the  beginning  of  the  input\nline.\n\nIn  MathML  mode, the mark and lineup features don't work.  These could, in theory, be imple‐\nmented with ‘<maligngroup>’ elements.\n\nIn MathML mode, each digit of a numeric literal gets a separate ‘<mn></mn>’ pair, and decimal\npoints are tagged with ‘<mo></mo>’.  This is allowed by the specification, but inefficient.\n\n### SEE ALSO\n\ngroff(1), troff(1), pic(1), grofffont(5), The TeXbook\n\n\n\ngroff 1.22.4                                23 March 2022                                     EQN(1)\n\n"
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    "structuredContent": {
        "command": "eqn",
        "section": "1",
        "mode": "man",
        "summary": "eqn - format equations for troff or MathML",
        "synopsis": "eqn [-rvCNR] [-d xy] [-T name] [-M dir] [-f F] [-s n] [-p n] [-m n] [file ...]",
        "flags": [
            {
                "flag": "-d",
                "long": null,
                "arg": null,
                "description": "tions. Any delim statements in the source file overrides this."
            },
            {
                "flag": "-C",
                "long": null,
                "arg": null,
                "description": "Also, the statement ‘delim on’ is not handled specially."
            },
            {
                "flag": "-N",
                "long": null,
                "arg": null,
                "description": "missing closing delimiters."
            },
            {
                "flag": "-v",
                "long": null,
                "arg": null,
                "description": ""
            },
            {
                "flag": "-r",
                "long": null,
                "arg": null,
                "description": ""
            },
            {
                "flag": "-m",
                "long": null,
                "arg": null,
                "description": "scripts to a smaller size than n."
            },
            {
                "flag": "-T",
                "long": null,
                "arg": null,
                "description": "name with a value of 1; eqnrc uses this to provide definitions appropriate for the output device. However, if the specified device is “MathML”, the output is MathML markup rather than troff commands, and eqnrc is not loaded at all. The default output device is ps."
            },
            {
                "flag": "-M",
                "long": null,
                "arg": null,
                "description": ""
            },
            {
                "flag": "-R",
                "long": null,
                "arg": null,
                "description": ""
            },
            {
                "flag": "-f",
                "long": null,
                "arg": null,
                "description": ""
            },
            {
                "flag": "-s",
                "long": null,
                "arg": null,
                "description": "sets equations at whatever the current point size is when the equation is encountered."
            },
            {
                "flag": "-p",
                "long": null,
                "arg": null,
                "description": "rounding text. This option is deprecated. Normally eqn sets subscripts and super‐ scripts at 70% of the size of the surrounding text."
            }
        ],
        "examples": [],
        "see_also": [
            {
                "name": "groff",
                "section": "1",
                "url": "https://www.chedong.com/phpMan.php/man/groff/1/json"
            },
            {
                "name": "troff",
                "section": "1",
                "url": "https://www.chedong.com/phpMan.php/man/troff/1/json"
            },
            {
                "name": "pic",
                "section": "1",
                "url": "https://www.chedong.com/phpMan.php/man/pic/1/json"
            },
            {
                "name": "grofffont",
                "section": "5",
                "url": "https://www.chedong.com/phpMan.php/man/grofffont/5/json"
            }
        ],
        "section_outline": [
            {
                "name": "NAME",
                "lines": 2,
                "subsections": []
            },
            {
                "name": "SYNOPSIS",
                "lines": 2,
                "subsections": []
            },
            {
                "name": "DESCRIPTION",
                "lines": 16,
                "subsections": []
            },
            {
                "name": "OPTIONS",
                "lines": 2,
                "subsections": [
                    {
                        "name": "-d",
                        "lines": 2,
                        "flag": "-d"
                    },
                    {
                        "name": "-C",
                        "lines": 2,
                        "flag": "-C"
                    },
                    {
                        "name": "-N",
                        "lines": 2,
                        "flag": "-N"
                    },
                    {
                        "name": "-v",
                        "lines": 1,
                        "flag": "-v"
                    },
                    {
                        "name": "-r",
                        "lines": 1,
                        "flag": "-r"
                    },
                    {
                        "name": "-m",
                        "lines": 2,
                        "flag": "-m"
                    },
                    {
                        "name": "-T",
                        "lines": 5,
                        "flag": "-T"
                    },
                    {
                        "name": "-M",
                        "lines": 1,
                        "flag": "-M"
                    },
                    {
                        "name": "-R",
                        "lines": 1,
                        "flag": "-R"
                    },
                    {
                        "name": "-f",
                        "lines": 1,
                        "flag": "-f"
                    },
                    {
                        "name": "-s",
                        "lines": 2,
                        "flag": "-s"
                    },
                    {
                        "name": "-p",
                        "lines": 3,
                        "flag": "-p"
                    }
                ]
            },
            {
                "name": "USAGE",
                "lines": 11,
                "subsections": [
                    {
                        "name": "Controlling delimiters",
                        "lines": 7
                    },
                    {
                        "name": "Automatic spacing",
                        "lines": 35
                    },
                    {
                        "name": "New primitives",
                        "lines": 115
                    },
                    {
                        "name": "Extended primitives",
                        "lines": 13
                    },
                    {
                        "name": "Customization",
                        "lines": 163
                    },
                    {
                        "name": "Macros",
                        "lines": 28
                    },
                    {
                        "name": "Fonts",
                        "lines": 18
                    }
                ]
            },
            {
                "name": "FILES",
                "lines": 3,
                "subsections": []
            },
            {
                "name": "MATHML MODE LIMITATIONS",
                "lines": 22,
                "subsections": []
            },
            {
                "name": "BUGS",
                "lines": 9,
                "subsections": []
            },
            {
                "name": "SEE ALSO",
                "lines": 5,
                "subsections": []
            }
        ]
    }
}