declare various unused variables and remove unused variables
make sure $h exists in tohsv()
spelling, declare isReferenced
declare media properties
remove $name from Definition->compileparams()
declare Operation properties
Quoted properties
remove dead $return
remove dead $rules
declare Selector properties
declare UnicodeDescriptor $value
declare Unit $backupUnit
set default value for $i
no need to set $selectors
declare charsets property