# Group FMIndex RankDictionary Specialisations
Tags that can be chosen to specify a certain RankDictionary.

## Grouped Tags Overview

- `SBM`
  Tag that specifies the FMIndex to use a StringSet of rank support bis strings as the occurrence table.
- `WT`
  Tag that specifies the FMIndex to use a wavelet tree as the occurrence table.

## Grouped Tags Detail

### `SBM`

Tag that specifies the FMIndex to use a StringSet of rank support bis strings as the occurrence table.

### `WT`

Tag that specifies the FMIndex to use a wavelet tree as the occurrence table.

#### Dox Sources

    /*!
     * @defgroup FMIndexRankDictionarySpec FMIndex RankDictionary Specialisations
     *
     * @brief Tags that can be chosen to specify a certain @link RankDictionary
     *        @endlink.
     *
     * @tag FMIndexRankDictionarySpec#WT
     *
     * @brief Tag that specifies the @link FMIndex @endlink to use a wavelet tree as
     *        the occurrence table.
     *
     * @tag FMIndexRankDictionarySpec#SBM
     *
     * @brief Tag that specifies the @link FMIndex @endlink to use a StringSet of
     *        rank support bis strings as the occurrence table.
     */