modify_text_entity
modify_text_entity (name, text[, type])
This function allows you to change the declaration of a text entity.
name is the name of an existing text entity. The & prefix is optional.
text is the new replacement text.
type is supplied, and should be one of the following:
• CDATA — character data
• PI — processing instruction
• MS — marked section
• MD — markup declaration
If omitted, the entity is a normal entity (that is, the markup within the replacement text is recognized).
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