A controller class and {HEAD ~ subsidiary classes} represent the rich text and provide methods to convert html to the memory structure and {TAIL ~ back}, representing the rich text in a relational database, retrieving the rich text from a relational database, and presenting the rich text for editing 
A controller class and { HEAD ~ subsidiary classes } represent the rich text and provide methods to convert html to the memory structure and { TAIL ~ back } , representing the rich text in a relational database , retrieving the rich text from a relational database , and presenting the rich text for editing
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