# Glossary Glossary of IntelliJ Platform specific terms. See also [Oracle's Java Technology Glossary](https://www.oracle.com/java/technologies/glossary.html). ## A Abstract Syntax Tree _(AST)_ : The [Abstract Syntax Tree](implementing_parser_and_psi.md) represents the structure of source input files.
→ _Program Structure Interface_ Annotator : Provides [semantic highlighting](syntax_highlighting_and_error_highlighting.md) based on underlying → _Program Structure Interface_ elements.
→ _Inspection_ ## B Blocking Context : Executing in the [Blocking Context](execution_contexts.topic#blocking-context) means executing tasks on a thread without access to a coroutine context.
→ _Suspending Context_
→ _Coroutine Execution Context_
→ _Coroutine_ ## C `CancellationException` _(CE)_ : `java.util.concurrent.CancellationException`, `kotlin.coroutines.cancellation.CancellationException` (typealias in stdlib), `kotlinx.coroutines.CancellationException` (typealias in kotlinx-coroutines)
→ _ProcessCanceledException_ Coroutine : A [Kotlin coroutines](kotlin_coroutines.md) execution unit allowing for handling concurrency and asynchronous tasks efficiently with a sequential/imperative code style. Coroutine Dispatcher : Part of the coroutine context. Determines a thread or a thread pool the corresponding coroutine is executed on. See [](coroutine_dispatchers.md) for more details.
→ _Coroutine_ Coroutine Execution Context : Executing in the [Coroutine Execution Context](execution_contexts.topic#blocking-context) means executing code (suspending or non-suspending/blocking) from a coroutine. Coroutine Scope : [Coroutine scopes](coroutine_scopes.md) define the lifetime of coroutines and ensure proper handling of coroutine cancellations and structured concurrency.
→ _Coroutine_ ## D Document Object Model _(DOM)_ : [](xml_dom_api.md) abstracts working with XML files based on a custom semantic model. ## E Event Dispatch Thread _(EDT)_ : The [Event Dispatch Thread](https://docs.oracle.com/javase/tutorial/uiswing/concurrency/dispatch.html) handles all Swing events. See also [](threading_model.md) and [](coroutine_dispatchers.md#edt-dispatcher). Extension Point _(EP)_ : Most functionality is provided by [Using Extension Points](plugin_extensions.md) provided by the platform or plugins. Plugins can also [define their own](plugin_extension_points.md) to allow extensibility. External System _(ES)_ : [](external_system_integration.md) allows integrating external project management systems. ## F Feature Usage Statistics _(FUS)_ : JetBrains internal API to track feature usage in the IDE. File Based Index _(FBI)_ : [File Based Index](file_based_indexes.md) allows storing key-value information based on the project's files. ## G Gradle Build Script : A configuration file written in Kotlin (build.gradle.kts) or Groovy (build.gradle) that describes the build process and dependencies of a plugin. ## I Inspection : Supports configurable [semantic highlighting](code_inspections_and_intentions.md).
→ _Annotator_ Intention : Provides an [automated fix](code_inspections_and_intentions.md) for commonly encountered code problems. ## L Language Server Protocol _(LSP)_ : Communication standard between development tools and Language Servers, see [](language_server_protocol.md). Local History _(LVCS)_ : A builtin → _Version Control System_ tracking all changes in the project [locally](https://www.jetbrains.com/help/idea/local-history.html). Look and Feel _(LaF)_ : Defines the visual appearance and behavior of the user interface; see [Swing Tutorial](https://docs.oracle.com/javase/tutorial/uiswing/lookandfeel/index.html). ## J JetBrains Project System _(JPS)_ : Represents the project model in [External Build](external_builder_api.md#accessing-project-model-and-configuration-from-external-build) process. JetBrains Runtime _(JBR)_ : The [JetBrains Runtime](ide_development_instance.md#using-a-jetbrains-runtime-for-the-development-instance) is the default bundled runtime for all IntelliJ Platform-based IDEs by JetBrains. ## N Non-Blocking Read Action _(NBRA)_ : A → _Read Action_ that is canceled by a → _Write Action_. See also [](threading_model.md#read-action-cancellability). ## P `ProcessCanceledException` _(PCE)_ : [`ProcessCanceledException`](%gh-ic%/platform/util/base/src/com/intellij/openapi/progress/ProcessCanceledException.java) An exception indicating that the currently running operation was terminated and should finish as soon as possible.
→ _CancellationException_ Program Structure Interface _(PSI)_ : The [Program Structure Interface](psi.md) represents a syntactic and semantic code model of the source input files.
→ _Abstract Syntax Tree_ → _Stubs_ ## R Read Action _(RA)_ : Allows accessing code-related data structures for reading purposes. See also [](threading_model.md).
→ _Non-Blocking Read Action_ → _Write Action_ Run Configuration _(RC)_ : A [Run Configuration](run_configurations.md) allows running external processes from within the IDE. ## S Structural Search and Replace _(SSR)_ : Allows searching and replacing code by defining the structure of the searched code fragments, see [](plugin_alternatives.md#structural-search-and-replace-inspections). Stubs : A subset of a → _Program Structure Interface_ tree in a binary serialized compact format, see [](stub_indexes.md). Suspending Context : Executing in the [Suspending Context](execution_contexts.topic#suspending-context-coroutines) means executing tasks in Kotlin coroutines.
→ _Blocking Context_
→ _Coroutine Execution Context_
→ _Coroutine_ Symbol : A semantic element in some model, e.g., language or framework model, see [](symbols.md). ## U Unified Abstract Syntax Tree _(UAST)_ : An [abstraction layer](uast.md) on the → _Program Structure Interface_ of different JVM languages. ## V Version Control System _(VCS)_ : The API for [Version Control System](vcs_integration_for_plugins.md) allows accessing builtin as well as adding custom implementations. Virtual File _(VF)_ : A [Virtual File](virtual_file.md) represents a file in a → _Virtual File System_. Virtual File System _(VFS)_ : A [Virtual File System](virtual_file_system.md) provides a unified API for working with files represented as → _Virtual File_. ## W Write Action _(WA)_ : Allows accessing code-related data structures for writing purposes. See also [](threading_model.md).
→ _Read Action_ Write Allowing Read Action _(WARA)_ : A coroutine → _Read Action_ that is canceled by an incoming → _Write Action_. See [](coroutine_read_actions.topic#coroutine-read-actions-api) for details.
→ _Suspending Context_
→ _Coroutine_ Write Blocking Read Action _(WBRA)_ : A coroutine → _Read Action_ that blocks incoming → _Write Action_. See [](coroutine_read_actions.topic#coroutine-read-actions-api) for details.
→ _Suspending Context_
→ _Coroutine_