Here are the classes, structs, unions and interfaces with brief descriptions:

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RPlugin
Core
IRScript	RScript interface
RController
REngine	Public facing R execution engine
RScript	Base class for IRScript inherited classes
RScriptResult	Responsible for returning the output of calling a script. It is up to the user to check the results of ExitCode.
RUtil	Utilities class
Exceptions
RDataException	Exception for invalid data
RExecutionException	Exception for script execution errors
TraceLab
Components
DevelopmentKit
IO
Artifacts	SEMERU corpus artifacts importer class To be replaced by standard TraceLab components
BiGrams	Responsible for importing and exporting BiGramCollections to disk
Generics	Importers for lists of generic types
Metrics	Writes classes implenting IMetricComputation to disk
Oracle	Responsible for importing answer sets
Similarities	Responsible for TLSimilarityMatrix I/O
Stopwords	Responsible for importing stopwords.
Metrics
FeatureLocation
EffectivenessAllMeasureComputation	Computes effectiveness measures for gold set
EffectivenessBestMeasureComputation	Computes effectiveness measure for first correct link in goldset
Traceability
AveragePrecisionQueryComputation	Computes average precision for each source artifact
AveragePrecisionRanklistComputation	Computes average precision at ranklist granularity
MeanAveragePrecisionComputation	Computes mean average precision
PrecisionQueryComputation	Computes precision of returned links for each source artifact
PrecisionRanklistComputation	Computes precision for ranklist
PrecisionRecallCurveComputation	Computes precision and recall for each link in ranklist. Results can be graphed as a curve.
RecallQueryComputation	Computes recall for each source artifact
RecallRanklistComputation	Computes recall for ranklist
PCAScript	Computes Principal Component Analysis for a collection of similarity matrices
IMetricComputation	Interface for defining new metrics.
MetricComputation	Abstract class for defining new metrics. Includes common functionality for derived classes. Input should be defined in the constructor.
Postprocessors
CSTI
DeltaUtils	Calculations for computing delta in O-CSTI and UD-CSTI
OCSTI	Optimistic Combination of Structural and Textual Information
UDCSTI	User-Driven Combination of Structural and Textual Information
AffineTranformation	Responsible for computing affine transformations of two distributions.
Preprocessors
ExecutionTraces
JPDA	Responsible for analyzing JPDA-formatted execution tracfes
TPTP	Responsible for analyzing JPDA-formatted execution tracfes
Splitters
CamelCaseSplitter	Provides functionality for splitting terms in CamelCase format
SemeruSplitter	SEMERU identifier splitting algorithm
Stemmers
Porter
PorterStemmer	Porter stemming algorithm
PorterStemmerUtils	Provides TraceLab functionality for the Porter Stemmer
Snowball
Languages
Among
CzechStemmer	Czech language Snowball implementation
DanishStemmer	Danish language Snowball implementation
DutchStemmer	Dutch language Snowball implementation
EnglishStemmer	English language Snowball implementation
FinnishStemmer	FInnish language Snowball implementation
FrenchStemmer	French language Snowball implementation
GermanStemmer	German language Snowball implementation
HungarianStemmer	Hungarian language Snowball implementation
ItalianStemmer	Italian language Snowball implementation
NorwegianStemmer	Norwegian language Snowball implementation
PortugalStemmer	Portuguese language Snowball implementation
RomanianStemmer	Romanian language Snowball implementation
RussianStemmer	RUssian language Snowball stemmer
SpanishStemmer	Spanish language Snowball implementation
StemmerOperations	Provides stemmer operations for the Snowball stemmer
ISnowballStemmer	Snowball stemmer interface
SnowballStemmer	Implements functionality for stemming artifacts using the Snowball stemming algorithm.
SnowballStemmerUtils	Provides additional functionality for the Snowball namespace
POSTagger	Responsible for tagging Parts-of-Speech (POS) based on the Stanford NLP POS-tagger Model files can be found here: http://nlp.stanford.edu/software/tagger.shtml#Download
Cleanup	Provides "cleanup" functionality for preprocessing a raw corpus
SimpleStopwordsRemover	Removes numbers and terms less than a certain length.
SmoothingFilter	Provides smoothing filter functionality for TermDocumentMatrix
StopwordsRemover	Provides stopwords removal functionality
Tracers
InformationRetrieval
JSD	Responsible for computing Jensen-Shannon divergence
VSM	Responsible for computing VSM similarities
GibbsLDA_GAScript	Computes ideal parameters for LDA using a genetic algorithm
GibbsLDAScript	Computes Latent Dirichlet Allocation using package `topicmodels`
LDACorpus	Representation of corpus in package `lda`
LDACorpusInfo	Corpus cache information
LDAScript	Computes Latent Dirichlet Allocation using package `lda`
LSAScript	Computes Latent Semantic Analysis (also known as Latent Semantic Indexing or LSI)
RTMScript	Computes Relational Topic Model
WebMining
HITSScript	Calculates HITS for an execution trace
PageRankScript	Computes PageRank for execution traces
Utils
TermDocumentMatrixUtils
SimilarityUtil	Provides similarity score computation utilities for TermDocumentMatrix
WeightUtil	Provides weighting scheme utilities for TermDocumentMatrix
TLSimilarityMatrixUtil	TLSimilarityMatrix utility functions
DevelopmentKitException	Exception for controlled circumstances within the TraceLab Component Development Kit
TermDocumentMatrix	Basic representation of a corpus. Columns are terms, rows are documents.
Library
Exporters
Artifacts
ArtifactsSimpleExporter
ArtifactsSimpleExporterConfig
ArtifactsXMLExporter
ArtifactsXMLExporterConfig
SimilarityMatrices
SimilarityMatrixCSVExporter
SimilarityMatrixCSVExporterConfig
SimilarityMatrixCSVExporterWithCorrectness
SimilarityMatrixCSVExporterWithCorrectnessConfig
SimilarityMatrixExporter
SimilarityMatrixExporterConfig
Helpers
DirectoryReader
DirectoryReaderConfig
GetStringFromStringList
Incrementer
IncrementerConfig
IntegerWriter
IntegerWriterConfig
StringWriter
StringWriterConfig
Importers
Artifacts
ArtifactsDirectoryImporter
ArtifactsDirectoryImporterConfig
ArtifactsMappingImporter
ArtifactsMappingImporterConfig
ArtifactsSimpleImporter
ArtifactsSimpleImporterConfig
ArtifactsXMLImporter
ArtifactsXMLImporterConfig
TermDocumentMatrixImporter
TermDocumentMatrixConfig
TermDocumentMatrixTransposedImporter
TermDocumentMatrixTransposedConfig
Generics
GenericImporterConfig
ListDoubleImporter
ListIntegerImporter
ListStringImporter
SimilarityMatrices
AnswerMatrixDirectoryImporter
AnswerMatrixDirectoryImporterConfig
AnswerMatrixImporter
AnswerMatrixImporterConfig
AnswerMatrixXMLImporter
AnswerMatrixXMLImporterConfig
SimilaritiesImporter
SimilarityMatrixImporterConfig
SimilarityMatrixNullImporter
Stopwords
StopwordsImporter
StopwordsImporterConfig
Metrics
Controller
ResultsController
ResultsControllerComponent
ResultsControllerExporter
ResultsControllerExporterConfig
FeatureLocation
FeatureLocationMetricsComponent
FeatureLocationMetricsConfig
Traceability
TraceabilityMetricsQueryComponent
TraceabilityMetricsQueryConfig
TraceabilityMetricsRanklistComponent
TraceabilityMetricsRanklistConfig
DoublePCAComponent
LambdaCalculationComponent
QuadruplePCAComponent
TriplePCAComponent
MetricsConfig	Abstract class for defining custom metrics configuration objects
Postprocessors
LinkPruning
LinkExtractorComponent
RemoveBottomPercentageComponent
RemoveBottomPercentageComponentConfig
RemoveTopPercentageComponent
RemoveTopPercentageComponentConfig
RetrieveLinksAtRecallComponent
RetrieveLinksAtRecallComponentConfig
RetrieveTopNLinksComponent
RetrieveTopNLinksComponentConfig
AffineTransformationComponent
AffineTransformationConfig
AffineTransformationLambdaComponent
OCSTIComponent
SimilarityMergeComponent
UDCSTIComponent
Preprocessors
ExecutionTraces
JPDAComponent
JPDAComponentConfig
TPTPComponent
TPTPComponentConfig
Splitters
CamelCaseSplitterComponent
CamelCaseSplitterComponentConfig
SemeruSplitterComponent
SemeruSplitterComponentConfig
Stemmers
PorterStemmerComponent
SnowballStemmerComponent
SnowballStemmerComponentConfig
POSExtractorComponent
POSExtractorConfig
PreprocessorCleanUpComponent
CleanupComponentConfig
SimpleStopWordsComponent
SimpleStopwordsComponentConfig
StopWordsComponent
StopwordsComponentConfig
Tracers
InformationRetrieval
JSDComponent
JSDSmoothComponent
VSMComponent
VSMComponentConfig
VSMSmoothComponent
GibbsLDA_GAComponent
GibbsLDAComponent
GibbsLDALoopComponent
LDAComponent
LDALoopComponent
LSAComponent
RTMComponent
RTMLoopComponent
WebMining
HITSComponent
PageRankComponent
Types
Preprocessors
ExecutionTraces
BiGram	Represents a method call in the form caller -> callee
BiGramCollection	Collection of BiGrams
PDG	Program Dependency Graph
PDGEdge	PDG edge representation
PDGNode	PDG node representation
Tracers
InformationRetrieval
GibbsLDA_GAConfig
GibbsLDAConfig
LDAConfig
LSAConfig
RTMConfig
WebMining
HITSConfig
HITSResult
PageRankConfig
WebMiningConfig
RConfig