| Interface | Description | 
|---|---|
| Scanner | This interface represents an input stream of  Tokens. | 
| Class | Description | 
|---|---|
| Constant | |
| ScannerImpl | 
 Scanner produces tokens of the following types:
 STREAM-START
 STREAM-END
 COMMENT
 DIRECTIVE(name, value)
 DOCUMENT-START
 DOCUMENT-END
 BLOCK-SEQUENCE-START
 BLOCK-MAPPING-START
 BLOCK-END
 FLOW-SEQUENCE-START
 FLOW-MAPPING-START
 FLOW-SEQUENCE-END
 FLOW-MAPPING-END
 BLOCK-ENTRY
 FLOW-ENTRY
 KEY
 VALUE
 ALIAS(value)
 ANCHOR(value)
 TAG(value)
 SCALAR(value, plain, style)
 Read comments in the Scanner code for more details. | 
| Exception | Description | 
|---|---|
| ScannerException | Exception thrown by the  Scannerimplementations in case of malformed
 input. | 
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