Class ClassicTokenizer
A grammar-based tokenizer constructed with JFlex (and then ported to .NET)
This should be a good tokenizer for most European-language documents:
- Splits words at punctuation characters, removing punctuation. However, a dot that's not followed by whitespace is considered part of a token.
- Splits words at hyphens, unless there's a number in the token, in which case the whole token is interpreted as a product number and is not split.
- Recognizes email addresses and internet hostnames as one token.
Many applications have specific tokenizer needs. If this tokenizer does not suit your application, please consider copying this source code directory to your project and maintaining your own grammar-based tokenizer. ClassicTokenizer was named StandardTokenizer in Lucene versions prior to 3.1. As of 3.1, StandardTokenizer implements Unicode text segmentation, as specified by UAX#29.
Inherited Members
Assembly: Lucene.Net.Analysis.Common.dll
Syntax
[Serializable]
public sealed class ClassicTokenizer : Tokenizer, IDisposableConstructors
| Name | Description |
|---|---|
| ClassicTokenizer(LuceneVersion, AttributeSource.AttributeFactory, TextReader) | Creates a new ClassicTokenizer with a given AttributeSource.AttributeFactory |
| ClassicTokenizer(LuceneVersion, TextReader) | Creates a new instance of the ClassicTokenizer. Attaches
the |
Fields
| Name | Description |
|---|---|
| ACRONYM | |
| ACRONYM_DEP | |
| ALPHANUM | |
| APOSTROPHE | |
| CJ | |
| COMPANY | |
| HOST | |
| NUM | |
| TOKEN_TYPES | String token types that correspond to token type int constants |
Properties
| Name | Description |
|---|---|
| MaxTokenLength | Set the max allowed token length. Any token longer than this is skipped. |
Methods
| Name | Description |
|---|---|
| Dispose(Boolean) | |
| End() | |
| IncrementToken() | |
| Reset() |
