This option controls how entities/characters get processed by TinyMCE. The value can be set as shown in Encoding Types below.
|named||Characters will be converted into named entities based on the entities option. For example, a non-breaking space could be encoded as .|
|numeric||Characters will be converted into numeric entities. For example, a non-breaking space would be encoded as  .|
|raw||All characters will be stored in non-entity form except these XML default entities: & < > "|
entity_encoding : "raw"