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37 * Implements functions in selhelp.h.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
40 * \ingroup module_selection
51 #include <boost/scoped_ptr.hpp>
53 #include "gromacs/onlinehelp/helptopic.h"
54 #include "gromacs/onlinehelp/helpwritercontext.h"
55 #include "gromacs/utility/exceptions.h"
56 #include "gromacs/utility/file.h"
57 #include "gromacs/utility/gmxassert.h"
58 #include "gromacs/utility/stringutil.h"
60 #include "selmethod.h"
68 static const char name[];
69 static const char title[];
70 static const char *const text[];
73 const char CommonHelpText::name[] = "selections";
74 const char CommonHelpText::title[] =
75 "Selection syntax and usage";
76 const char *const CommonHelpText::text[] = {
77 "Selections are used to select atoms/molecules/residues for analysis.",
78 "In contrast to traditional index files, selections can be dynamic, i.e.,",
79 "select different atoms for different trajectory frames. The GROMACS",
80 "manual contains a short introductory section to selections in the",
81 "Analysis chapter, including suggestions on how to get familiar with",
82 "selections if you are new to the concept. The subtopics listed below",
83 "provide more details on the technical and syntactic aspects of",
86 "Each analysis tool requires a different number of selections and the",
87 "selections are interpreted differently. The general idea is still the",
88 "same: each selection evaluates to a set of positions, where a position",
89 "can be an atom position or center-of-mass or center-of-geometry of",
90 "a set of atoms. The tool then uses these positions for its analysis to",
91 "allow very flexible processing. Some analysis tools may have limitations",
92 "on the types of selections allowed."
95 struct ArithmeticHelpText
97 static const char name[];
98 static const char title[];
99 static const char *const text[];
102 const char ArithmeticHelpText::name[] = "arithmetic";
103 const char ArithmeticHelpText::title[] =
104 "Arithmetic expressions in selections";
105 const char *const ArithmeticHelpText::text[] = {
106 "Basic arithmetic evaluation is supported for numeric expressions.",
107 "Supported operations are addition, subtraction, negation, multiplication,",
108 "division, and exponentiation (using ^).",
109 "Result of a division by zero or other illegal operations is undefined.",
112 struct CmdLineHelpText
114 static const char name[];
115 static const char title[];
116 static const char *const text[];
119 const char CmdLineHelpText::name[] = "cmdline";
120 const char CmdLineHelpText::title[] =
121 "Specifying selections from command line";
122 const char *const CmdLineHelpText::text[] = {
123 "If no selections are provided on the command line, you are prompted to",
124 "type the selections interactively (a pipe can also be used to provide",
125 "the selections in this case for most tools). While this works well for",
126 "testing, it is easier to provide the selections from the command line",
127 "if they are complex or for scripting.[PAR]",
129 "Each tool has different command-line arguments for specifying selections",
130 "(listed by [TT][PROGRAM] help <tool>[tt]).",
131 "You can either pass a single string containing all selections (separated",
132 "by semicolons), or multiple strings, each containing one selection.",
133 "Note that you need to quote the selections to protect them from the",
136 "If you set a selection command-line argument, but do not provide any",
137 "selections, you are prompted to type the selections for that argument",
138 "interactively. This is useful if that selection argument is optional,",
139 "in which case it is not normally prompted for.[PAR]",
141 "To provide selections from a file, use [TT]-sf file.dat[tt] in the place",
142 "of the selection for a selection argument (e.g.,",
143 "[TT]-select -sf file.dat[tt]). In general, the [TT]-sf[tt] argument reads",
144 "selections from the provided file and assigns them to selection arguments",
145 "that have been specified up to that point, but for which no selections",
146 "have been provided.",
147 "As a special case, [TT]-sf[tt] provided on its own, without preceding",
148 "selection arguments, assigns the selections to all (yet unset) required",
149 "selections (i.e., those that would be promted interactively if no",
150 "selections are provided on the command line).[PAR]",
152 "To use groups from a traditional index file, use argument [TT]-n[tt]",
153 "to provide a file. See the \"syntax\" subtopic for how to use them.",
154 "If this option is not provided, default groups are generated.",
155 "The default groups are generated by reading selections from a file",
156 "[TT]defselection.dat[tt]. If such a file is found in the current",
157 "directory, it is used instead of the one provided by default.[PAR]",
159 "Depending on the tool, two additional command-line arguments may be",
160 "available to control the behavior:",
162 "* [TT]-seltype[tt] can be used to specify the default type of",
163 " positions to calculate for each selection.",
164 "* [TT]-selrpos[tt] can be used to specify the default type of",
165 " positions used in selecting atoms by coordinates.",
167 "See the \"positions\" subtopic for more information on these options.",
170 struct EvaluationHelpText
172 static const char name[];
173 static const char title[];
174 static const char *const text[];
177 const char EvaluationHelpText::name[] = "evaluation";
178 const char EvaluationHelpText::title[] =
179 "Selection evaluation and optimization";
180 const char *const EvaluationHelpText::text[] = {
181 "Boolean evaluation proceeds from left to right and is short-circuiting",
182 "i.e., as soon as it is known whether an atom will be selected, the",
183 "remaining expressions are not evaluated at all.",
184 "This can be used to optimize the selections: you should write the",
185 "most restrictive and/or the most inexpensive expressions first in",
186 "boolean expressions.",
187 "The relative ordering between dynamic and static expressions does not",
188 "matter: all static expressions are evaluated only once, before the first",
189 "frame, and the result becomes the leftmost expression.[PAR]",
191 "Another point for optimization is in common subexpressions: they are not",
192 "automatically recognized, but can be manually optimized by the use of",
193 "variables. This can have a big impact on the performance of complex",
194 "selections, in particular if you define several index groups like this::",
196 " rdist = distance from com of resnr 1 to 5;",
197 " resname RES and rdist < 2;",
198 " resname RES and rdist < 4;",
199 " resname RES and rdist < 6;",
201 "Without the variable assignment, the distances would be evaluated three",
202 "times, although they are exactly the same within each selection.",
203 "Anything assigned into a variable becomes a common subexpression that",
204 "is evaluated only once during a frame.",
205 "Currently, in some cases the use of variables can actually lead to a small",
206 "performance loss because of the checks necessary to determine for which",
207 "atoms the expression has already been evaluated, but this should not be",
211 struct ExamplesHelpText
213 static const char name[];
214 static const char title[];
215 static const char *const text[];
218 const char ExamplesHelpText::name[] = "examples";
219 const char ExamplesHelpText::title[] =
220 "Selection examples";
221 const char *const ExamplesHelpText::text[] = {
222 // TODO: Once there are more tools available, use examples that invoke
223 // tools and explain what the selections do in those tools.
224 "Below, examples of increasingly complex selections are given.[PAR]",
226 "Selection of all water oxygens::",
228 " resname SOL and name OW",
231 "Centers of mass of residues 1 to 5 and 10::",
233 " res_com of resnr 1 to 5 10",
236 "All atoms farther than 1 nm of a fixed position::",
238 " not within 1 of [1.2, 3.1, 2.4]",
241 "All atoms of a residue LIG within 0.5 nm of a protein (with a custom name)::",
243 " \"Close to protein\" resname LIG and within 0.5 of group \"Protein\"",
246 "All protein residues that have at least one atom within 0.5 nm of a residue LIG::",
248 " group \"Protein\" and same residue as within 0.5 of resname LIG",
251 "All RES residues whose COM is between 2 and 4 nm from the COM of all of them::",
253 " rdist = res_com distance from com of resname RES",
254 " resname RES and rdist >= 2 and rdist <= 4",
257 "Selection like C1 C2 C2 C3 C3 C4 ... C8 C9 (e.g., for g_bond)::",
259 " name \"C[1-8]\" merge name \"C[2-9]\"",
262 struct KeywordsHelpText
264 static const char name[];
265 static const char title[];
266 static const char *const text[];
269 const char KeywordsHelpText::name[] = "keywords";
270 const char KeywordsHelpText::title[] =
271 "Selection keywords";
272 const char *const KeywordsHelpText::text[] = {
273 "The following selection keywords are currently available.",
274 "For keywords marked with a star, additional help is available through",
275 "a subtopic KEYWORD, where KEYWORD is the name of the keyword.",
278 struct LimitationsHelpText
280 static const char name[];
281 static const char title[];
282 static const char *const text[];
285 const char LimitationsHelpText::name[] = "limitations";
286 const char LimitationsHelpText::title[] =
287 "Selection limitations";
288 const char *const LimitationsHelpText::text[] = {
289 "* Some analysis programs may require a special structure for the input",
290 " selections (e.g., some options of [TT]gmx gangle[tt] require the index",
291 " group to be made of groups of three or four atoms).",
292 " For such programs, it is up to the user to provide a proper selection",
293 " expression that always returns such positions.",
295 "* All selection keywords select atoms in increasing order, i.e., you can",
296 " consider them as set operations that in the end return the atoms in",
297 " sorted numerical order. For example, the following selections select",
298 " the same atoms in the same order::",
305 " atomnr 10 11 12 13",
306 " atomnr 12 13 10 11",
310 " If you need atoms/positions in a different order, you can:",
312 " * use external index groups (for some static selections),",
313 " * use the [TT]permute[tt] keyword to change the final order, or",
314 " * use the [TT]merge[tt] or [TT]plus[tt] keywords to compose the",
315 " final selection from multiple distinct selections.",
317 "* Due to technical reasons, having a negative value as the first value in",
318 " expressions like ::",
320 " charge -1 to -0.7",
322 " result in a syntax error. A workaround is to write ::",
324 " charge {-1 to -0.7}",
328 "* When [TT]name[tt] selection keyword is used together with PDB input",
329 " files, the behavior may be unintuitive. When GROMACS reads in a PDB",
330 " file, 4 character atom names that start with a digit are transformed",
331 " such that, e.g., 1HG2 becomes HG21, and the latter is what is matched",
332 " by the [TT]name[tt] keyword. Use [TT]pdbname[tt] to match the atom name",
333 " as it appears in the input PDB file.",
336 struct PositionsHelpText
338 static const char name[];
339 static const char title[];
340 static const char *const text[];
343 const char PositionsHelpText::name[] = "positions";
344 const char PositionsHelpText::title[] =
345 "Specifying positions in selections";
346 const char *const PositionsHelpText::text[] = {
347 "Possible ways of specifying positions in selections are:[PAR]",
349 "1. A constant position can be defined as [TT][XX, YY, ZZ][tt], where",
350 "[TT]XX[tt], [TT]YY[tt] and [TT]ZZ[tt] are real numbers.[PAR]",
352 "2. [TT]com of ATOM_EXPR [pbc][tt] or [TT]cog of ATOM_EXPR [pbc][tt]",
353 "calculate the center of mass/geometry of [TT]ATOM_EXPR[tt]. If",
354 "[TT]pbc[tt] is specified, the center is calculated iteratively to try",
355 "to deal with cases where [TT]ATOM_EXPR[tt] wraps around periodic",
356 "boundary conditions.[PAR]",
358 "3. [TT]POSTYPE of ATOM_EXPR[tt] calculates the specified positions for",
359 "the atoms in [TT]ATOM_EXPR[tt].",
360 "[TT]POSTYPE[tt] can be [TT]atom[tt], [TT]res_com[tt], [TT]res_cog[tt],",
361 "[TT]mol_com[tt] or [TT]mol_cog[tt], with an optional prefix [TT]whole_[tt]",
362 "[TT]part_[tt] or [TT]dyn_[tt].",
363 "[TT]whole_[tt] calculates the centers for the whole residue/molecule,",
364 "even if only part of it is selected.",
365 "[TT]part_[tt] prefix calculates the centers for the selected atoms, but",
366 "uses always the same atoms for the same residue/molecule. The used atoms",
367 "are determined from the the largest group allowed by the selection.",
368 "[TT]dyn_[tt] calculates the centers strictly only for the selected atoms.",
369 "If no prefix is specified, whole selections default to [TT]part_[tt] and",
370 "other places default to [TT]whole_[tt].",
371 "The latter is often desirable to select the same molecules in different",
372 "tools, while the first is a compromise between speed ([TT]dyn_[tt]",
373 "positions can be slower to evaluate than [TT]part_[tt]) and intuitive",
376 "4. [TT]ATOM_EXPR[tt], when given for whole selections, is handled as 3.",
377 "above, using the position type from the command-line argument",
378 "[TT]-seltype[tt].[PAR]",
380 "Selection keywords that select atoms based on their positions, such as",
381 "[TT]dist from[tt], use by default the positions defined by the",
382 "[TT]-selrpos[tt] command-line option.",
383 "This can be overridden by prepending a [TT]POSTYPE[tt] specifier to the",
384 "keyword. For example, [TT]res_com dist from POS[tt] evaluates the",
385 "residue center of mass distances. In the example, all atoms of a residue",
386 "are either selected or not, based on the single distance calculated.",
389 struct SyntaxHelpText
391 static const char name[];
392 static const char title[];
393 static const char *const text[];
396 const char SyntaxHelpText::name[] = "syntax";
397 const char SyntaxHelpText::title[] =
399 const char *const SyntaxHelpText::text[] = {
400 "A set of selections consists of one or more selections, separated by",
401 "semicolons. Each selection defines a set of positions for the analysis.",
402 "Each selection can also be preceded by a string that gives a name for",
403 "the selection for use in, e.g., graph legends.",
404 "If no name is provided, the string used for the selection is used",
405 "automatically as the name.[PAR]",
407 "For interactive input, the syntax is slightly altered: line breaks can",
408 "also be used to separate selections. \\ followed by a line break can",
409 "be used to continue a line if necessary.",
410 "Notice that the above only applies to real interactive input,",
411 "not if you provide the selections, e.g., from a pipe.[PAR]",
413 "It is possible to use variables to store selection expressions.",
414 "A variable is defined with the following syntax::",
418 "where [TT]EXPR[tt] is any valid selection expression.",
419 "After this, [TT]VARNAME[tt] can be used anywhere where [TT]EXPR[tt]",
420 "would be valid.[PAR]",
422 "Selections are composed of three main types of expressions, those that",
423 "define atoms ([TT]ATOM_EXPR[tt]), those that define positions",
424 "([TT]POS_EXPR[tt]), and those that evaluate to numeric values",
425 "([TT]NUM_EXPR[tt]). Each selection should be a [TT]POS_EXPR[tt]",
426 "or a [TT]ATOM_EXPR[tt] (the latter is automatically converted to",
427 "positions). The basic rules are as follows:",
429 "* An expression like [TT]NUM_EXPR1 < NUM_EXPR2[tt] evaluates to an",
430 " [TT]ATOM_EXPR[tt] that selects all the atoms for which the comparison",
432 "* Atom expressions can be combined with boolean operations such as",
433 " [TT]not ATOM_EXPR[tt], [TT]ATOM_EXPR and ATOM_EXPR[tt], or",
434 " [TT]ATOM_EXPR or ATOM_EXPR[tt]. Parentheses can be used to alter the",
435 " evaluation order.",
436 "* [TT]ATOM_EXPR[tt] expressions can be converted into [TT]POS_EXPR[tt]",
437 " expressions in various ways, see the \"positions\" subtopic for more",
439 "* [TT]POS_EXPR[tt] can be converted into [TT]NUM_EXPR[tt] using syntax",
440 " like \"[TT]x of POS_EXPR[tt]\". Currently, this is only supported for single",
441 " positions like in expression \"[TT]x of cog of ATOM_EXPR[tt]\".",
444 "Some keywords select atoms based on string values such as the atom name.",
445 "For these keywords, it is possible to use wildcards ([TT]name \"C*\"[tt])",
446 "or regular expressions (e.g., [TT]resname \"R[AB]\"[tt]).",
447 "The match type is automatically guessed from the string: if it contains",
448 "other characters than letters, numbers, '*', or '?', it is interpreted",
449 "as a regular expression.",
450 "To force the matching to use literal string matching, use",
451 "[TT]name = \"C*\"[tt] to match a literal C*.",
452 "To force other type of matching, use '?' or '~' in place of '=' to force",
453 "wildcard or regular expression matching, respectively.[PAR]",
455 "Strings that contain non-alphanumeric characters should be enclosed in",
456 "double quotes as in the examples. For other strings, the quotes are",
457 "optional, but if the value conflicts with a reserved keyword, a syntax",
458 "error will occur. If your strings contain uppercase letters, this should",
461 "Index groups provided with the [TT]-n[tt] command-line option or",
462 "generated by default can be accessed with [TT]group NR[tt] or",
463 "[TT]group NAME[tt], where [TT]NR[tt] is a zero-based index of the group",
464 "and [TT]NAME[tt] is part of the name of the desired group.",
465 "The keyword [TT]group[tt] is optional if the whole selection is",
466 "provided from an index group.",
467 "To see a list of available groups in the interactive mode, press enter",
468 "in the beginning of a line.",
480 * Help topic implementation for an individual selection method.
482 * \ingroup module_selection
484 class KeywordDetailsHelpTopic : public AbstractSimpleHelpTopic
487 //! Initialize help topic for the given selection method.
488 KeywordDetailsHelpTopic(const std::string &name,
489 const gmx_ana_selmethod_t &method)
490 : name_(name), method_(method)
494 virtual const char *name() const
496 return name_.c_str();
498 virtual const char *title() const
500 return method_.help.helpTitle;
504 virtual std::string helpText() const
506 return joinStrings(method_.help.help,
507 method_.help.help + method_.help.nlhelp, "\n");
512 const gmx_ana_selmethod_t &method_;
514 GMX_DISALLOW_COPY_AND_ASSIGN(KeywordDetailsHelpTopic);
518 * Custom help topic for printing a list of selection keywords.
520 * \ingroup module_selection
522 class KeywordsHelpTopic : public CompositeHelpTopic<KeywordsHelpText>
527 virtual void writeHelp(const HelpWriterContext &context) const;
531 * Container for known selection methods.
533 * The first item in the pair is the name of the selection method, and
534 * the second points to the static data structure that describes the
536 * The name in the first item may differ from the name of the static
537 * data structure if an alias is defined for that method.
539 typedef std::vector<std::pair<std::string,
540 const gmx_ana_selmethod_t *> >
544 * Prints markup for starting a list of keywords.
546 void writeKeywordListStart(const HelpWriterContext &context,
547 const char *heading) const;
549 * Prints markup for ending a list of keywords.
551 void writeKeywordListEnd(const HelpWriterContext &context,
552 const char *extraInfo) const;
555 * Prints a brief list of keywords (selection methods) available.
557 * \param[in] context Context for printing the help.
558 * \param[in] type Only methods that return this type are printed.
559 * \param[in] bModifiers If false, \ref SMETH_MODIFIER methods are
560 * excluded, otherwise only them are printed.
562 void printKeywordList(const HelpWriterContext &context,
563 e_selvalue_t type, bool bModifiers) const;
566 * Prints the detailed help for keywords for rst export.
568 void writeKeywordSubTopics(const HelpWriterContext &context) const;
573 KeywordsHelpTopic::KeywordsHelpTopic()
575 // TODO: This is not a very elegant way of getting the list of selection
576 // methods, but this needs to be rewritten in any case if/when #652 is
578 boost::scoped_ptr<SelectionParserSymbolTable> symtab(
579 new SelectionParserSymbolTable);
580 gmx_ana_selmethod_register_defaults(symtab.get());
582 SelectionParserSymbolIterator symbol
583 = symtab->beginIterator(SelectionParserSymbol::MethodSymbol);
584 while (symbol != symtab->endIterator())
586 const std::string &symname = symbol->name();
587 const gmx_ana_selmethod_t *method = symbol->methodValue();
588 methods_.push_back(std::make_pair(std::string(symname), method));
589 if (method->help.nlhelp > 0 && method->help.help != NULL)
591 addSubTopic(HelpTopicPointer(
592 new KeywordDetailsHelpTopic(symname, *method)));
598 void KeywordsHelpTopic::writeHelp(const HelpWriterContext &context) const
600 context.writeTextBlock(helpText());
601 context.writeTextBlock("");
603 // Print the list of keywords
604 writeKeywordListStart(context, "Keywords that select atoms by an integer property:");
605 printKeywordList(context, INT_VALUE, false);
606 writeKeywordListEnd(context, "(use in expressions or like \"atomnr 1 to 5 7 9\")");
608 writeKeywordListStart(context, "Keywords that select atoms by a numeric property:");
609 printKeywordList(context, REAL_VALUE, false);
610 writeKeywordListEnd(context, "(use in expressions or like \"occupancy 0.5 to 1\")");
612 writeKeywordListStart(context, "Keywords that select atoms by a string property:");
613 printKeywordList(context, STR_VALUE, false);
614 writeKeywordListEnd(context, "(use like \"name PATTERN [PATTERN] ...\")");
616 writeKeywordListStart(context, "Additional keywords that directly select atoms:");
617 printKeywordList(context, GROUP_VALUE, false);
618 writeKeywordListEnd(context, NULL);
620 writeKeywordListStart(context, "Keywords that directly evaluate to positions:");
621 printKeywordList(context, POS_VALUE, false);
622 writeKeywordListEnd(context, "(see also \"positions\" subtopic)");
624 writeKeywordListStart(context, "Additional keywords:");
625 printKeywordList(context, POS_VALUE, true);
626 printKeywordList(context, NO_VALUE, true);
627 writeKeywordListEnd(context, NULL);
629 writeKeywordSubTopics(context);
632 void KeywordsHelpTopic::writeKeywordListStart(const HelpWriterContext &context,
633 const char *heading) const
635 context.writeTextBlock(heading);
636 if (context.outputFormat() == eHelpOutputFormat_Rst)
638 context.writeTextBlock("");
639 context.writeTextBlock("::");
640 context.writeTextBlock("");
644 void KeywordsHelpTopic::writeKeywordListEnd(const HelpWriterContext &context,
645 const char *extraInfo) const
647 if (context.outputFormat() == eHelpOutputFormat_Rst)
649 context.writeTextBlock("");
651 if (!isNullOrEmpty(extraInfo))
653 context.writeTextBlock(extraInfo);
655 context.writeTextBlock("");
658 void KeywordsHelpTopic::printKeywordList(const HelpWriterContext &context,
660 bool bModifiers) const
662 File &file = context.outputFile();
663 MethodList::const_iterator iter;
664 for (iter = methods_.begin(); iter != methods_.end(); ++iter)
666 const gmx_ana_selmethod_t &method = *iter->second;
667 const bool bIsModifier
668 = (method.flags & SMETH_MODIFIER) != 0;
669 if (method.type == type && bModifiers == bIsModifier)
671 const bool bHasHelp = (method.help.nlhelp > 0 && method.help.help != NULL);
672 const bool bPrintStar
673 = bHasHelp && context.outputFormat() == eHelpOutputFormat_Console;
674 file.writeString(formatString(" %c ", bPrintStar ? '*' : ' '));
675 if (method.help.syntax != NULL)
677 file.writeLine(method.help.syntax);
681 std::string symname = iter->first;
682 if (symname != method.name)
684 symname.append(formatString(" (synonym for %s)", method.name));
686 file.writeLine(symname);
692 void KeywordsHelpTopic::writeKeywordSubTopics(const HelpWriterContext &context) const
694 if (context.outputFormat() != eHelpOutputFormat_Rst)
698 std::set<std::string> usedSymbols;
699 MethodList::const_iterator iter;
700 for (iter = methods_.begin(); iter != methods_.end(); ++iter)
702 const gmx_ana_selmethod_t &method = *iter->second;
704 = (method.help.nlhelp > 0 && method.help.help != NULL);
705 if (!bHasHelp || usedSymbols.count(iter->first) > 0)
711 if (method.help.helpTitle != NULL)
713 title = method.help.helpTitle;
716 title.append(iter->first);
717 MethodList::const_iterator mergeIter = iter;
718 for (++mergeIter; mergeIter != methods_.end(); ++mergeIter)
720 if (mergeIter->second->help.help == method.help.help)
723 title.append(mergeIter->first);
724 usedSymbols.insert(mergeIter->first);
728 const HelpTopicInterface *subTopic = findSubTopic(iter->first.c_str());
729 GMX_RELEASE_ASSERT(subTopic != NULL, "Keyword subtopic no longer exists");
730 HelpWriterContext subContext(context);
731 subContext.enterSubSection(title);
732 subTopic->writeHelp(subContext);
733 context.writeTextBlock("");
740 HelpTopicPointer createSelectionHelpTopic()
742 CompositeHelpTopicPointer root(new CompositeHelpTopic<CommonHelpText>);
743 root->registerSubTopic<SimpleHelpTopic<CmdLineHelpText> >();
744 root->registerSubTopic<SimpleHelpTopic<SyntaxHelpText> >();
745 root->registerSubTopic<SimpleHelpTopic<PositionsHelpText> >();
746 root->registerSubTopic<SimpleHelpTopic<ArithmeticHelpText> >();
747 root->registerSubTopic<KeywordsHelpTopic>();
748 root->registerSubTopic<SimpleHelpTopic<EvaluationHelpText> >();
749 root->registerSubTopic<SimpleHelpTopic<LimitationsHelpText> >();
750 root->registerSubTopic<SimpleHelpTopic<ExamplesHelpText> >();