<!-- ================================================================= -->
<!-- ccris DTD

    This is the Current DTD which NLM has written for
     external use.

    Comments and suggestions are welcome.
     2004/02/26

 -->
<!-- ================================================================= -->
<!ENTITY auml  "&#228;">
<!ENTITY ouml  "&#246;">
<!ENTITY uuml  "&#252;">
<!ELEMENT ccris (DOC)+>
<!ELEMENT DOC ((DOCNO|NameOfSubstance|CASRegistryNumber|DateRevised|
ccn|cstu|date|dtyp|
istu|
mstu|tstu|use)*)>
<!ELEMENT cstu ((specc|ref|stsxc|routc|dosec|tstlc|rsltc)*)>
<!ELEMENT istu ((speci|ref|noat|stsxi|rtini|doini|crcni|rtcai|docai|prmti|rtpri|dopri|tttli|endii|endmi|endli|commi)*)>
<!ELEMENT mstu ((tsstm|ref|indcm|matvm|methm|rsltm|dosem)*)>
<!ELEMENT tstu ((spect|ref|stsxt|rtprt|doprt|crcnt|rtcat|docat|tttlt)*)>
<!ELEMENT DOCNO (#PCDATA)>
<!ELEMENT NameOfSubstance (#PCDATA)>
<!ELEMENT CASRegistryNumber (#PCDATA)>
<!ELEMENT DateRevised (#PCDATA)>
<!ELEMENT ccn (#PCDATA)>
<!ELEMENT commi (#PCDATA)>
<!ELEMENT crcni (#PCDATA)>
<!ELEMENT crcnt (#PCDATA)>
<!ELEMENT date (#PCDATA)>
<!ELEMENT docai (#PCDATA)>
<!ELEMENT docat (#PCDATA)>
<!ELEMENT doini (#PCDATA)>
<!ELEMENT dopri (#PCDATA)>
<!ELEMENT doprt (#PCDATA)>
<!ELEMENT dosec (#PCDATA)>
<!ELEMENT dosem (#PCDATA)>
<!ELEMENT dtyp (#PCDATA)>
<!ELEMENT endii (#PCDATA)>
<!ELEMENT endli (#PCDATA)>
<!ELEMENT endmi (#PCDATA)>
<!ELEMENT indcm (#PCDATA)>
<!ELEMENT matvm (#PCDATA)>
<!ELEMENT methm (#PCDATA)>
<!ELEMENT noat (#PCDATA)>
<!ELEMENT prmti (#PCDATA)>
<!ELEMENT ref (#PCDATA)>
<!ELEMENT routc (#PCDATA)>
<!ELEMENT rsltc (#PCDATA)>
<!ELEMENT rsltm (#PCDATA)>
<!ELEMENT rtcai (#PCDATA)>
<!ELEMENT rtcat (#PCDATA)>
<!ELEMENT rtini (#PCDATA)>
<!ELEMENT rtpri (#PCDATA)>
<!ELEMENT rtprt (#PCDATA)>
<!ELEMENT specc (#PCDATA)>
<!ELEMENT speci (#PCDATA)>
<!ELEMENT spect (#PCDATA)>
<!ELEMENT stsxc (#PCDATA)>
<!ELEMENT stsxi (#PCDATA)>
<!ELEMENT stsxt (#PCDATA)>
<!ELEMENT tsstm (#PCDATA)>
<!ELEMENT tstlc (#PCDATA)>
<!ELEMENT tttli (#PCDATA)>
<!ELEMENT tttlt (#PCDATA)>
<!ELEMENT use (#PCDATA)>