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Path	Synopsis
beam Package beam is an implementation of the Apache Beam (https://beam.apache.org) programming model in Go.	Package beam is an implementation of the Apache Beam (https://beam.apache.org) programming model in Go.
artifact Package artifact contains utilities for staging and retrieving artifacts.	Package artifact contains utilities for staging and retrieving artifacts.
artifact/gcsproxy Package gcsproxy contains artifact staging and retrieval servers backed by GCS.	Package gcsproxy contains artifact staging and retrieval servers backed by GCS.
core Package core contains constants and other static data related to the SDK, such as the SDK Name and version.	Package core contains constants and other static data related to the SDK, such as the SDK Name and version.
core/funcx Package funcx contains functions and types used to perform type analysis of Beam functions.	Package funcx contains functions and types used to perform type analysis of Beam functions.
core/graph Package graph is the internal representation of the Beam execution plan.	Package graph is the internal representation of the Beam execution plan.
core/graph/coder Package coder contains coder representation and utilities.	Package coder contains coder representation and utilities.
core/graph/coder/testutil Package testutil contains helpers to test and validate custom Beam Schema coders.	Package testutil contains helpers to test and validate custom Beam Schema coders.
core/graph/mtime Package mtime contains a millisecond representation of time.	Package mtime contains a millisecond representation of time.
core/graph/window Package window contains window representation, windowing strategies and utilities.	Package window contains window representation, windowing strategies and utilities.
core/graph/window/trigger Package trigger helps construct aggregation triggers.	Package trigger helps construct aggregation triggers.
core/metrics Package metrics implements the Beam metrics API, described at http://s.apache.org/beam-metrics-api Metrics in the Beam model are uniquely identified by a namespace, a name, and the PTransform context in which they are used.	Package metrics implements the Beam metrics API, described at http://s.apache.org/beam-metrics-api Metrics in the Beam model are uniquely identified by a namespace, a name, and the PTransform context in which they are used.
core/runtime Package runtime contains runtime hooks and utilities for pipeline options and type registration.	Package runtime contains runtime hooks and utilities for pipeline options and type registration.
core/runtime/coderx Package coderx contains coders for primitive types that aren't included in the beam model.	Package coderx contains coders for primitive types that aren't included in the beam model.
core/runtime/exec Package exec contains runtime plan representation and execution.	Package exec contains runtime plan representation and execution.
core/runtime/exec/optimized Package optimized contains type-specialized shims for faster execution.	Package optimized contains type-specialized shims for faster execution.
core/runtime/genx Package genx is a convenience package to better support the code generator.	Package genx is a convenience package to better support the code generator.
core/runtime/graphx Package graphx provides facilities to help with the serialization of pipelines into a serializable graph structure suitable for the worker.	Package graphx provides facilities to help with the serialization of pipelines into a serializable graph structure suitable for the worker.
core/runtime/graphx/schema Package schema contains utility functions for relating Go types and Beam Schemas.	Package schema contains utility functions for relating Go types and Beam Schemas.
core/runtime/graphx/v1
core/runtime/harness Package harness implements the SDK side of the Beam FnAPI.	Package harness implements the SDK side of the Beam FnAPI.
core/runtime/harness/init Package init contains the harness initialization code defined by the FnAPI.	Package init contains the harness initialization code defined by the FnAPI.
core/runtime/harness/session
core/runtime/harness/statecache Package statecache implements the state caching feature described by the Beam Fn API The Beam State API and the intended caching behavior are described here: https://docs.google.com/document/d/1BOozW0bzBuz4oHJEuZNDOHdzaV5Y56ix58Ozrqm2jFg/edit#heading=h.7ghoih5aig5m	Package statecache implements the state caching feature described by the Beam Fn API The Beam State API and the intended caching behavior are described here: https://docs.google.com/document/d/1BOozW0bzBuz4oHJEuZNDOHdzaV5Y56ix58Ozrqm2jFg/edit#heading=h.7ghoih5aig5m
core/runtime/metricsx
core/runtime/pipelinex Package pipelinex contains utilities for manipulating Beam proto pipelines.	Package pipelinex contains utilities for manipulating Beam proto pipelines.
core/runtime/xlangx Package xlangx contains various low-level utilities needed for adding cross-language transforms to the pipeline.	Package xlangx contains various low-level utilities needed for adding cross-language transforms to the pipeline.
core/runtime/xlangx/expansionx Package expansionx contains utilities for starting expansion services for cross-language transforms.	Package expansionx contains utilities for starting expansion services for cross-language transforms.
core/sdf Package contains interfaces used specifically for splittable DoFns.	Package contains interfaces used specifically for splittable DoFns.
core/typex Package typex contains full type representation for PCollections and DoFns, and utilities for type checking.	Package typex contains full type representation for PCollections and DoFns, and utilities for type checking.
core/util/dot Package dot produces DOT graphs from Beam graph representations.	Package dot produces DOT graphs from Beam graph representations.
core/util/hooks Package hooks allows runners to tailor execution of the worker harness.	Package hooks allows runners to tailor execution of the worker harness.
core/util/ioutilx Package ioutilx contains additional io utilities.	Package ioutilx contains additional io utilities.
core/util/jsonx Package jsonx contains utilities for working with JSON encoded data.	Package jsonx contains utilities for working with JSON encoded data.
core/util/protox Package protox contains utilities for working with protobufs.	Package protox contains utilities for working with protobufs.
core/util/reflectx Package reflectx contains a set of reflection utilities and well-known types.	Package reflectx contains a set of reflection utilities and well-known types.
core/util/stringx Package stringx contains utilities for working with strings.	Package stringx contains utilities for working with strings.
core/util/symtab Package symtab allows reading low-level symbol information from the symbol table.	Package symtab allows reading low-level symbol information from the symbol table.
internal/errors Package errors contains functionality for creating and wrapping errors with improved formatting compared to the standard Go error functionality.	Package errors contains functionality for creating and wrapping errors with improved formatting compared to the standard Go error functionality.
io/avroio Package avroio contains transforms for reading and writing avro files.	Package avroio contains transforms for reading and writing avro files.
io/bigqueryio Package bigqueryio provides transformations and utilities to interact with Google BigQuery.	Package bigqueryio provides transformations and utilities to interact with Google BigQuery.
io/databaseio Package databaseio provides transformations and utilities to interact with generic database database/sql API.	Package databaseio provides transformations and utilities to interact with generic database database/sql API.
io/datastoreio Package datastoreio provides transformations and utilities to interact with Google Datastore.	Package datastoreio provides transformations and utilities to interact with Google Datastore.
io/filesystem Package filesystem contains an extensible file system abstraction.	Package filesystem contains an extensible file system abstraction.
io/filesystem/gcs Package gcs contains a Google Cloud Storage (GCS) implementation of the Beam file system.	Package gcs contains a Google Cloud Storage (GCS) implementation of the Beam file system.
io/filesystem/local Package local contains a local file implementation of the Beam file system.	Package local contains a local file implementation of the Beam file system.
io/filesystem/memfs Package memfs contains a in-memory Beam filesystem.	Package memfs contains a in-memory Beam filesystem.
io/pubsubio Package pubsubio provides access to PubSub on Dataflow streaming.	Package pubsubio provides access to PubSub on Dataflow streaming.
io/rtrackers/offsetrange Package offsetrange defines a restriction and restriction tracker for offset ranges.	Package offsetrange defines a restriction and restriction tracker for offset ranges.
io/synthetic Package synthetic contains transforms for creating synthetic pipelines.	Package synthetic contains transforms for creating synthetic pipelines.
io/textio Package textio contains transforms for reading and writing text files.	Package textio contains transforms for reading and writing text files.
io/xlang/kafkaio Package kafkaio contains cross-language functionality for using Apache Kafka (http://kafka.apache.org/).	Package kafkaio contains cross-language functionality for using Apache Kafka (http://kafka.apache.org/).
log Package log contains a re-targetable context-aware logging system.	Package log contains a re-targetable context-aware logging system.
model Package model contains the portable Beam model contracts.	Package model contains the portable Beam model contracts.
model/fnexecution_v1
model/jobmanagement_v1
model/pipeline_v1
options/gcpopts Package gcpopts contains shared options for Google Cloud Platform.	Package gcpopts contains shared options for Google Cloud Platform.
options/jobopts Package jobopts contains shared options for job submission.	Package jobopts contains shared options for job submission.
provision Package provision contains utilities for obtaining runtime provision, information -- such as pipeline options.	Package provision contains utilities for obtaining runtime provision, information -- such as pipeline options.
runners Package runners defines the common "--runner" flag.	Package runners defines the common "--runner" flag.
runners/dataflow Package dataflow contains the Dataflow runner for submitting pipelines to Google Cloud Dataflow.	Package dataflow contains the Dataflow runner for submitting pipelines to Google Cloud Dataflow.
runners/dataflow/dataflowlib Package dataflowlib translates a Beam pipeline model to the Dataflow API job model, for submission to Google Cloud Dataflow.	Package dataflowlib translates a Beam pipeline model to the Dataflow API job model, for submission to Google Cloud Dataflow.
runners/direct Package direct contains the direct runner for running single-bundle pipelines in the current process.	Package direct contains the direct runner for running single-bundle pipelines in the current process.
runners/dot Package dot is a Beam runner that "runs" a pipeline by producing a DOT graph of the execution plan.	Package dot is a Beam runner that "runs" a pipeline by producing a DOT graph of the execution plan.
runners/flink Package flink contains the Flink runner.	Package flink contains the Flink runner.
runners/samza Package samza contains the Samza runner.	Package samza contains the Samza runner.
runners/session
runners/spark Package spark contains the Spark runner.	Package spark contains the Spark runner.
runners/universal Package universal contains a general-purpose runner that can submit jobs to any portable Beam runner.	Package universal contains a general-purpose runner that can submit jobs to any portable Beam runner.
runners/universal/extworker Package extworker provides an external worker service and related utilities.	Package extworker provides an external worker service and related utilities.
runners/universal/runnerlib Package runnerlib contains utilities for submitting Go pipelines to a Beam model runner.	Package runnerlib contains utilities for submitting Go pipelines to a Beam model runner.
runners/vet Package vet is a Beam runner that "runs" a pipeline by producing generated code to avoid symbol table lookups and reflection in pipeline execution.	Package vet is a Beam runner that "runs" a pipeline by producing generated code to avoid symbol table lookups and reflection in pipeline execution.
runners/vet/testpipeline Package testpipeline exports small test pipelines for testing the vet runner.	Package testpipeline exports small test pipelines for testing the vet runner.
testing/passert Package passert contains verification transformations for testing pipelines.	Package passert contains verification transformations for testing pipelines.
testing/ptest Package ptest contains utilities for pipeline unit testing.	Package ptest contains utilities for pipeline unit testing.
testing/teststream Package teststream contains code configuring the TestStream primitive for use in testing code that is meant to be run on streaming data sources.	Package teststream contains code configuring the TestStream primitive for use in testing code that is meant to be run on streaming data sources.
transforms/filter Package filter contains transformations for removing pipeline elements based on various conditions.	Package filter contains transformations for removing pipeline elements based on various conditions.
transforms/sql Package sql contains SQL transform APIs, allowing SQL queries to be used in Beam Go pipelines.	Package sql contains SQL transform APIs, allowing SQL queries to be used in Beam Go pipelines.
transforms/sql/sqlx Package sqlx contains "internal" SQL transform interfaces that are needed by the SQL expansion providers.	Package sqlx contains "internal" SQL transform interfaces that are needed by the SQL expansion providers.
transforms/stats Package stats contains transforms for statistical processing.	Package stats contains transforms for statistical processing.
transforms/top Package top contains transformations for finding the smallest (or largest) N elements based on arbitrary orderings.	Package top contains transformations for finding the smallest (or largest) N elements based on arbitrary orderings.
util/errorx Package errorx contains utilities for handling errors.	Package errorx contains utilities for handling errors.
util/execx Package execx contains wrappers and utilities for the exec package.	Package execx contains wrappers and utilities for the exec package.
util/gcsx Package gcsx contains utilities for working with Google Cloud Storage (GCS).	Package gcsx contains utilities for working with Google Cloud Storage (GCS).
util/grpcx Package grpcx contains utilities for working with gRPC.	Package grpcx contains utilities for working with gRPC.
util/harnessopts Package harnessopts defines user-facing entrypoints into Beam hooks affecting the SDK harness.	Package harnessopts defines user-facing entrypoints into Beam hooks affecting the SDK harness.
util/pubsubx Package pubsubx contains utilities for working with Google PubSub.	Package pubsubx contains utilities for working with Google PubSub.
util/shimx Package shimx specifies the templates for generating type assertion shims for Apache Beam Go SDK pipelines.	Package shimx specifies the templates for generating type assertion shims for Apache Beam Go SDK pipelines.
util/starcgenx Package starcgenx is a Static Analysis Type Assertion shim and Registration Code Generator which provides an extractor to extract types from a package, in order to generate approprate shimsr a package so code can be generated for it.	Package starcgenx is a Static Analysis Type Assertion shim and Registration Code Generator which provides an extractor to extract types from a package, in order to generate approprate shimsr a package so code can be generated for it.
util/syscallx Package syscallx provides system call utilities that attempt to hide platform differences.	Package syscallx provides system call utilities that attempt to hide platform differences.
x/beamx Package beamx is a convenience package for beam.	Package beamx is a convenience package for beam.
x/debug Package debug contains pipeline components that may help in debugging pipeline issues.	Package debug contains pipeline components that may help in debugging pipeline issues.
x/hooks/perf Package perf is to add performance measuring hooks to a runner, such as cpu, heap, or trace profiles.	Package perf is to add performance measuring hooks to a runner, such as cpu, heap, or trace profiles.