The following operations are supported. For a formal definition, please review the Service Description.

• ADQLtoSQL
  Take an ADQL Select structure and convert to SQL string
• SQLtoADQL
  Take an SQL string and convert it to the XML parsetree in ADQL
• SQLtoADQLString
  Take an SQL string and convert it to a string having the XML parsetree in ADQL
• ADQLStringtoSQL
  Take an ADQL Select (as an XML string) and convert to SQL string