This package provides classes associated with numbering and the `xsl:number` instruction.

It is possible to extend the range of numberings available by providing a Numberer for a specific language. This must be registered with the `Configuration`. In earlier releases, there was a fixed relationship between the language and the implementing class (the Numberer was always named Numberer_xx where xx is the language code, corresponding to the value of the lang attribute in `xsl:number`). From Saxon 9.2, this relationship no longer exists.

These classes also include code to support the localization of dates as defined in the XSLT `format-dateTime()` group of functions.

The class `Numberer_en` provides the standard numbering options. As well as the format tokens defined in the XSLT 1.0 specification (for example, "1", "001", "a", "i") it supports other numbering options including:

- Greek upper and lower case letters
  Cyrillic upper and lower case letters
  Hebrew letters
  Japanese: Hiragana-A, Hiragana-B, Katakana-A, or Katakana-B letters, and Kanji digits
  English words: the format token "one" produces numbers such as "twenty five"

Localizations for a number of European languages are provided in package `net.sf.saxon.option.local`. In Saxon-PE and Saxon-EE these are issued in binary form as part of the Saxon JAR. For Saxon-HE, they are issued only in source code form.