## Package org.apache.lucene.facet.index.streaming

Expert: attributes streaming definition for indexing facets

See:
Description

Class Summary
CategoryAttributesStream: An attribute stream built from an `Iterable` of `CategoryAttribute`.
CategoryListTokenizer: A base class for category list tokenizers, which add category list tokens to category streams.
CategoryParentsStream: This class adds parents to a `CategoryAttributesStream`.
CategoryTokenizer: Basic class for setting the `CharTermAttribute`s and `PayloadAttribute`s of category tokens.
CategoryTokenizerBase: A base class for all token filters which add term and payload attributes to tokens and are to be used in `CategoryDocumentBuilder`.
CountingListTokenizer: `CategoryListTokenizer` for facet counting

## Package org.apache.lucene.facet.index.streaming Description

# Expert: attributes streaming definition for indexing facets

Steaming of facets attributes is a low level indexing interface with Lucene indexing. There are two types of category related streams:

- Category tokenizer stream handles tokenization for a single category, e.g. for creating drill-down tokens.
- Category list tokenizer stream handles tokenization for multiple categories, e.g. for creating a counting list token, representing all the categories of a certain document.