Decide whether the given rune is in the XML Character Range, per the Char production of https://www.xml.com/axml/testaxml.htm, Section 2.2 Characters.

NewDecoder create new decoder instance.

NewDecoderWithPrefix create new decoder instance with custom attribute prefix and text prefix.

RemoveNonUTF8Bytes removes bytes that isn't UTF-8 encoded.

RemoveNonUTF8Strings removes strings that isn't UTF-8 encoded.

ErrInvalidDocument invalid document err.

ErrInvalidRoot data at the root level is invalid err.

Decoder instance.