<!ELEMENT pisettings (pK*)>
<!ELEMENT pK (coef*)>
<!ATTLIST pK author CDATA "Unknown">
<!ELEMENT coef (#PCDATA)>
<!ATTLIST coef data (A|C|D|E|F|G|H|I|K|L|M|N|P|Q|R|S|T|V|W|Y|Carboxyl|Amino) "Undefined">