class THtml::TPathDefinition: public THtml::THelperBase

 Determine the path to look for macros (see TDocMacroDirective) for
 classes from a given module. If the path was sucessfully determined return true.
 For ROOT, this directory is the "doc/macros" subdirectory of the module
 directory; the path returned is GetDocDir(module) + "/macros".

 If your software cannot be mapped into this scheme then derive your
 own class from TPathDefinition and pass it to THtml::SetPathDefinition().

 Determine the module's documentation directory. If module is empty,
 set doc_dir to the product's documentation directory.
 If the path was sucessfuly determined return true.
 For ROOT, this directory is the subdir "doc/" in the
 module's path; the directory returned is module + "/doc".

 If your software cannot be mapped into this scheme then derive your
 own class from TPathDefinition and pass it to THtml::SetPathDefinition().

 Determine the path and filename used in an include statement for the
 header file of the given class. E.g. the class ROOT::Math::Boost is
 meant to be included as "Math/Genvector/Boost.h" - which is what
 out_dir is set to. GetIncludeAs() returns whether the include
 statement's path was successfully determined.

 Any leading directory part that is part of fIncludePath (see SetIncludePath)
 will be removed. For ROOT, leading "include/" is removed; everything after
 is the include path.

 If your software cannot be mapped into this scheme then derive your
 own class from TPathDefinition and pass it to THtml::SetPathDefinition().

 Set out_fsname to the full pathname corresponding to a file
 included as "included". Return false if this file cannot be determined
 or found. For ROOT, out_fsname corresponds to included prepended with
 "include"; only THtml prefers to work on the original files, e.g.
 core/base/inc/TObject.h instead of include/TObject.h, so the
 default implementation searches the TFileSysDB for an entry with
 basename(included) and with matching directory part, setting out_fsname
 to the TFileSysEntry's path.