Class AstTermExtractionNode
The Term Extraction transformation extracts terms from input text columns and directs the terms to output text columns.
public class AstTermExtractionNode : AstSingleInTransformationNode, IBindableItem, IGetJsonProvider, INamedNode, IScopeBoundary, IReferenceableItem, IFrameworkItem, IValidationInfo, INamedItem, IDataflowItem
- Inheritance
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System.ObjectAstTermExtractionNode
Varigence.Utility.Collections.IVulcanCollectionParent, Varigence.Utility.ComponentModel.IVulcanNotifyPropertyChanged, Varigence.Utility.ComponentModel.IPropertyChangeNotificationTarget, System.ComponentModel.INotifyPropertyChanged, Varigence.Utility.Xml.IXObjectMappingProvider, System.ComponentModel.IDataErrorInfo, Varigence.Utility.Collections.IScopedNameIndexable,
Constructors
| AstTermExtractionNode(IFrameworkItem) | Initializes a new instance of the AstTermExtractionNode class with the specified parent node. |
Fields
| ScopedNamePrefixBackingStore | |
| IsScopeImported |
Properties
| CaseSensitiveTermExtraction | This value specifies whether the Term Extraction process is case sensitive. The default value is False. |
| CaseSensitiveTermExtractionDefaultValue | Gets the default value for the CaseSensitiveTermExtraction property |
| ErrorPath | Gets the error output path for this transformation |
| ExclusionTableConnection | This value specifies the name of the OLE DB connection that is used to connect to the exclusion term table. |
| ExclusionTermColumn | This values specifies which column contains terms that are skipped during the processing of extracting terms from the data source. |
| FriendlyTypeNameStatic | Gets the friendly name of the type of this node |
| OutputPath | Gets the output path for this transformation. This is the preferred output path and will automatically connect to any single-input transformation nodes that directly follow it in the Biml file. |
| ScoreOutputColumn | This value specifies the name of the dataflow column to use for the score output. The default value is "Score". |
| ScoreOutputColumnDefaultValue | Gets the default value for the ScoreOutputColumn property |
| ScoreType | This value specifies what kind of score is associated with an extracted term. The default value is that the frequency of a term is used as the score. |
| ScoreTypeDefaultValue | Gets the default value for the ScoreType property |
| TermExtractionColumn | This value specifies the name of the term extraction column. |
| TermExtractionColumnDefaultValue | Gets the default value for the TermExtractionColumn property |
| TermFrequencyThreshold | Specifies the frequency threshold above which a term is extracted. |
| TermFrequencyThresholdDefaultValue | Gets the default value for the TermFrequencyThreshold property |
| TermMaxLength | This value specifies the maximum number of words allowed in a term. The default value is 12. |
| TermMaxLengthDefaultValue | Gets the default value for the TermMaxLength property |
| TermOutputColumn | This value specifies the name of the dataflow column to use for the term output. The default value is "Term". |
| TermOutputColumnDefaultValue | Gets the default value for the TermOutputColumn property |
| TermType | This value specifies the type of terms to extract. The default value is that noun and noun phrases are extracted. |
| TermTypeDefaultValue | Gets the default value for the TermType property |
| InputPath | This specifies the input path that will be used by this dataflow component. If an input path is not specified, the dataflow component will attempt to automatically discover an appropriate input path based on the surrounding dataflow. |
| VisibleVariables | Gets a collection of all variable nodes that are available to be used by this transformation. It includes variables defined by this transformation and any tasks/packages that contain this transformation |
| PreferredOutputPath | Gets the preferred output path for the transformation. This output path will support automatic connections to single-input transformations that directly follow in the Biml code |
| DataflowInputs | Gets a collection of all dataflow input paths for this transformation |
| DataflowOutputs | Gets a collection of all dataflow output paths for this transformation |
| ValidateExternalMetadata | This value specifies whether the data flow transformation is validated against columns that originated in external data sources. When server assets such as tables and stored procedures are created during processing, ValidateExternalMetadata is normally set to False, which prevents validation from completing at compile time. |
| LocaleId | This value specifies which locale is used by the dataflow task. |
| ErrorHandling | This value specifies how errors are handled by default in columns processed by the component. This can be overriden at the component or column level for specific cases. |
| DataflowOverrides | Provides a collection of objects to override properties of the component, its input paths, its output paths, and its consituent dataflow columns. |
| ValidateExternalMetadataDefaultValue | Gets the default value for the ValidateExternalMetadata property |
| LocaleIdDefaultValue | Gets the default value for the LocaleId property |
| ScopedName | Gets the scoped name which can be used to uniquely identify this object among other objects of its type |
| SymbolTable | Gets a reference to the symbol table that stores a reference to this and all other named objects in the project |
| SsisSafeScopedName | Returns a version of the ScopedName that has been cleaned of invalid characters for SSIS. |
| SsisSafeName | Returns a version of the Name that has been cleaned of invalid characters for SSIS. |
| Name | Specifies the name of the object. This name can be used to reference this object from anywhere else in the program. |
| References | Gets collection of FrameworkItemReference objects, which track rich information about the properties that hold references to this node. |
| NameDefaultValue | Gets the default value for the Name property |
| Guid | |
| Annotations | This is a collection of annotation items that can be used to specify documentation, tags, or other information. Annotations are particularly useful for storing information about nodes that can be used by BimlScript code. |
| ObjectTag | This property provides a general purpose storage mechanism for .NET objects to be associated with AstNode objects. It supplements the annotation system, which is intended for use with string-based metadata. |
| BimlFile | This value specifies the BimlFile in which the Biml code that defines AstNode resides. |
| ItemLabel | Gets a label that can be used to identify this node |
| ParentItem | This value specifies the parent of the current node. All nodes must have a valid parent in the Biml framework, except for the root node. |
Methods
| BindingScopeBoundaries() | Retrieves the permitted scope boundaries to bind references from this node. |
| DefinedAstNodes() | Retrieves a collection of nodes that have been defined as direct children of the current node. |
| Duplicate() | Creates a duplicate of the current node |
| Duplicate(IFrameworkItem) | Creates a duplicate of the current node with the specified parent item |
| GetAllItemsReferencedByDefinedSuccessors() | Builds a list of all items referenced by this node and its successors. Each tuple in the returned list represents a FrameworkItemReference. The first item is the ReferencingItem, the second item is the property name, and the third item is the ReferencedItem. |
| GetDefaultValue(String) | Retrieves the default value for the property with the name propertyName |
| GetDefaultValue<T>(String) | Retrieves the default value for the property with the name propertyName |
| StructureEquals(Object) | Compares this node to the provided object to determine if all defined children and references are equal. |
| CurrentSourceOutputPath() | Retrieves the output path to which the input path of this transformation is currently connected. |
| GetOfflineSchemaItemResource() | |
| RegisterNewOutput(String) | Provides a convenience method for creating a new output path for the transformation, including both static and dynamic paths |
| RegisterNewOutput(String, Boolean) | Provides a convenience method for creating a new output path for the transformation, including both static and dynamic paths |
| DeregisterOutput(AstDataflowOutputPathNode) | Provides a convenience method for removing existing output paths from the transformation, including both static and dynamic paths |
| GetSchemaLocalName() | Retrieves the local XML element name that corresponds to this node in Biml code. |
| ToString() | Returns a string that represents the current object. In this case, it is the Name of the node. |
| OnScopedNameChanged(String, String) | |
| OnItemLabelChanged(String, String) | |
| OnNameChanging(String, String) | |
| OnNameChanged(String, String) | |
| AddScopedNameChangedEventListener(IReferenceableItem, EventHandler<VulcanPropertyChangedEventArgs>) | Adds the scoped name changed event handler to the specified referenceable item. |
| RemoveScopedNameChangedEventListener(IReferenceableItem, EventHandler<VulcanPropertyChangedEventArgs>) | Removes the scoped name changed event handler from the specified referenceable item. |
| FirstChildOfType<TChild>() | Gets the first defined descendant node of the specified type |
| RemoveFromParent() | Removes this node definition from its parent |
| GetJson() | Generates a JavaScript Object Notation (JSON) representation of the current node |
| GetExternalJson() | Generates a JavaScript Object Notation (JSON) representation of the current node |
| GetJson(Boolean, Boolean, Boolean, Boolean, Boolean) | Generates a JavaScript Object Notation (JSON) representation of the current node |
| GetXObjectName() | Gets the fully qualified XML element name for this node in the code document. |
| FirstParent<TAstNode>() | Retrieves the first parent or ancestor node of the specified type |
| FirstParent<TAstNode>(Type) | Retrieves the first parent or ancestor node of the specified type with the specified custom attribute type |
| FirstThisOrParent<TAstNode>() | Retrieves the first parent or ancestor node of the specified type, including this node |
| IsDirectAncestor(IFrameworkItem) | Retrieves a value indicating whether the specified node is a direct ancestor of this node. |
| AncestorDistance(IFrameworkItem) | Retrieves the number of steps between this node and the nearest shared ancestor with the specified relative node. |
| FirstThisOrParent<TAstNode>(Type) | Retrieves the first parent or ancestor node (including this node) of the specified type with the specified custom attribute type |
| AllDefinedSuccessors() | Retrieves the collection of all nodes defined as a child of this or any successor node or the current node |
| AllDefinedSuccessors(Boolean) | Retrieves the collection of all nodes defined as a child of this or any successor node or optionally the current node |
| OnNotificationTargetPropertyChanged(String) | |
| OnScopeBoundaryChanged(IScopeBoundary, IScopeBoundary) | |
| AddParseableChangedEventListener(IFlowFileChanged, EventHandler<EventArgs>) | |
| RemoveParseableChangedEventListener(IFlowFileChanged, EventHandler<EventArgs>) | |
| AddScopeBoundaryChangedEventListener(IFrameworkItem, EventHandler<VulcanPropertyChangedEventArgs>) | |
| RemoveScopeBoundaryChangedEventListener(IFrameworkItem, EventHandler<VulcanPropertyChangedEventArgs>) | |
| AddParsePendingChangedEventListener(IFlowFileChanged, EventHandler<EventArgs>) | |
| RemoveParsePendingChangedEventListener(IFlowFileChanged, EventHandler<EventArgs>) | |
| AddFromTemplateChangedEventListener(IFlowFileChanged, EventHandler<EventArgs>) | |
| RemoveFromTemplateChangedEventListener(IFlowFileChanged, EventHandler<EventArgs>) | |
| ParseSelf(XElement, ParserContext) | |
| ParseNameValueMapping(XElement) |