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