Here are the data structures with brief descriptions:
[detail level 123]
  HepMC3 | HepMC3 main namespace |
   AnalysisExample | Example analysis. Produces a rapidity distribution of final state particles |
| magic_t | Union to hold first 4 byts of file, i.e. magic bytes |
| ReaderGZ | GenEvent I/O parsing for structured text files compressed with gzip |
| WriterDOT | GenEvent I/O output to dot files that should be processed by graphviz or other software |
| WriterHEPEVTZEUS | GenEvent I/O output to files readable by ZEUS software |
| WriterRootTreeOPAL | GenEvent I/O output to files similar to these produced by OPAL software |
| AssociatedParticle | Attribute class allowing eg. a GenParticle to refer to another GenParticle |
| Attribute | Forward declaration of GenParticle |
| IntAttribute | Attribute that holds an Integer implemented as an int |
| LongAttribute | Attribute that holds an Integer implemented as an int |
| DoubleAttribute | Attribute that holds a real number as a double |
| FloatAttribute | Attribute that holds a real number as a float |
| StringAttribute | Attribute that holds a string |
| CharAttribute | Attribute that holds an Chareger implemented as an int |
| LongLongAttribute | Attribute that holds an Integer implemented as an int |
| LongDoubleAttribute | Attribute that holds a real number as a double |
| UIntAttribute | Attribute that holds an unsigned int |
| ULongAttribute | Attribute that holds an unsigned long |
| ULongLongAttribute | Attribute that holds an unsigned long long |
| BoolAttribute | Attribute that holds an Booleger implemented as an int |
| VectorCharAttribute | Attribute that holds a vector of charegers of type char |
| VectorFloatAttribute | Attribute that holds a vector of floategers of type float |
| VectorLongDoubleAttribute | Attribute that holds a vector of long doubleegers of type long double |
| VectorLongLongAttribute | Attribute that holds a vector of long longegers of type long long |
| VectorUIntAttribute | Attribute that holds a vector of unsigned integers of type unsigned int |
| VectorULongAttribute | Attribute that holds a vector of unsigned longegers of type unsigned long |
| VectorULongLongAttribute | Attribute that holds a vector of unsigned long longegers of type unsigned long long |
| VectorIntAttribute | Attribute that holds a vector of integers of type int |
| VectorLongIntAttribute | |
| VectorDoubleAttribute | |
| VectorStringAttribute | |
| GenEventData | Stores serializable event information |
| GenParticleData | Stores serializable particle information |
| GenRunInfoData | Stores serializable run information |
| GenVertexData | Stores serializable vertex information |
| FourVector | Generic 4-vector |
| GenCrossSection | Stores additional information about cross-section |
| GenEvent | Stores event-related information |
| GenHeavyIon | Stores additional information about Heavy Ion generator |
| GenParticle | Stores particle-related information |
| GenPdfInfo | Stores additional information about PDFs |
| GenRunInfo | Stores run-related information |
 ToolInfo | Interrnal struct for keeping track of tools |
| GenVertex | Stores vertex-related information |
| HEPEVT_Wrapper | An interface to HEPEVT common block |
| HEPRUPAttribute | Class for storing data for LHEF run information |
| HEPEUPAttribute | Class for storing data for LHEF run information |
| Print | Provides different printing formats |
| Reader | Base class for all I/O readers |
| ReaderAscii | GenEvent I/O parsing for structured text files |
| ReaderAsciiHepMC2 | Parser for HepMC2 I/O files |
| ReaderHEPEVT | GenEvent I/O parsing and serialization for HEPEVT files |
| ReaderLHEF | GenEvent I/O parsing and serialization for LHEF files |
| ReaderPlugin | GenEvent I/O parsing and serialization using external plugin |
| Setup | Configuration for HepMC |
| Units | Stores units-related enums and conversion functions |
| Writer | Base class for all I/O writers |
| WriterAscii | GenEvent I/O serialization for structured text files |
| WriterAsciiHepMC2 | GenEvent I/O serialization for structured text files |
| WriterHEPEVT | GenEvent I/O serialization for HEPEVT files |
| WriterPlugin | GenEvent I/O parsing and serialization using external plugin |
| ReaderRoot | GenEvent I/O parsing and serialization for root files |
| ReaderRootTree | GenEvent I/O parsing and serialization for root files based on root TTree |
| WriterRoot | GenEvent I/O serialization for root files |
| WriterRootTree | GenEvent I/O serialization for root files based on root TTree |
| AttributeFeature | AttributeFeature |
| GenericFeature | GenericFeature defines the Feature interface GenericFeature is not intended to be used directly. The derived Feature class and its specialisations should be used |
| Feature | Expose GenericFeature interface to derived Feature class |
| Feature< Feature_type, typename std::enable_if< std::is_integral< Feature_type >::value, void >::type > | Specialisation of Feature for integral types |
| Feature< Feature_type, typename std::enable_if< std::is_floating_point< Feature_type >::value, void >::type > | Specialisation of Feature for floating point type |
| ATTRIBUTE | Filter for the attributes |
| RelativesInterface | Forward declare the Relatives interface in which _parents and _children are wrapped |
| Recursive | Forward declare the recursion wrapper |
| hasId | HasID |
| idInterface | IDinterface |
| Relatives | Define a common interface that all Relatives objects will satisfy Relatives provides an operator to get the relatives of a range of different GenObject types. The following are examples |
| _parents | Provides operator to find the parent particles of a Vertex or Particle |
| _children | Provides operator to find the child particles of a Vertex or Particle |
| SelectorWrapper | Forward declaration of SelectorWrapper |
| Selector | Selector is an interface to "standard" Features that are valid for both integral and floating point comparisons |
| StandardSelector | StandardSelector |
| sort_by_id_asc | Comparison of two particle by id |
| GenParticlePtr_greater_order | Comparison of two particles |
| pair_GenVertexPtr_int_greater | Order vertices with equal paths |
| LHEF | Les Houches event file classes |
| OAttr | |
| XMLTag | |
| TagBase | |
| Generator | |
| XSecInfo | |
| EventFile | |
| Cut | |
| ProcInfo | |
| MergeInfo | |
| WeightInfo | |
| WeightGroup | |
| Weight | |
| Clus | |
| Scale | |
| Scales | |
| PDFInfo | |
| HEPRUP | |
| EventGroup | |
| HEPEUP | |
| Reader | |
| Writer | |
| HEPEVT | Fortran common block HEPEVT |
| HepMC3ViewerFrame | Definition of class HepMC3ViewerFrame used for simple GUI viewer |
| IsGoodEvent | |
| IsGoodEventDIS | |
| McTesterValidationTool | Interface to MCTester |
| MyClass | Sample class for root I/O test |
| MyRunClass | Sample class for root I/O test |
| OutputValidationTool | Interface for validatio to Pythia |
| PhotosValidationTool | Interface for validatio to Photos |
| PythiaValidationTool | Interface for validatio to Pythia |
| SimpleEventTool | Simple validation |
| TauolaValidationTool | Interface for validatio to Tauola |
| Timer | Used to benchmark MC generators |
| ValidationControl | Runs multiple validation tools |
| ValidationTool | Virtual Interface to validation tools |
