{
  "a": "html",
  "b": "html PUBLIC -//W3C//DTD XHTML 1.0 Transitional//EN http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd",
  "c": "cXML SYSTEM http://xml.cxml.org/schemas/cXML/1.2.014/cXML.dtd",
  "d": "people_list [<!ELEMENT people_list (person*)>\n      <!ELEMENT person (name, birthdate?, gender?, socialsecuritynumber?)>\n      <!ELEMENT name (#PCDATA)>\n      <!ELEMENT birthdate (#PCDATA)>\n      <!ELEMENT gender (#PCDATA)>\n      <!ELEMENT socialsecuritynumber (#PCDATA)>]"
}