#data
<unknown u1=""></unknown>
#errors
/unknown;unknown element;u
/unknown/@u1;unknown attribute;u

#data
<unknown u1="" u2=""></unknown>
#errors
/unknown;unknown element;u
/unknown/@u1;unknown attribute;u
/unknown/@u2;unknown attribute;u

#data
<unknown u1="" xmlns=""></unknown>
#errors
/unknown;unknown element;u
/unknown/@u1;unknown attribute;u

#data
<unknown xml:lang="!" xmlns=""></unknown>
#errors
/unknown;unknown element;u
/unknown/@lang;langtag:language:nosemantics;m
/unknown/@lang;langtag:illegal;m

#data
<unknown u1="" xml:lang="!" xmlns=""></unknown>
#errors
/unknown;unknown element;u
/unknown/@lang;langtag:language:nosemantics;m
/unknown/@lang;langtag:illegal;m
/unknown/@u1;unknown attribute;u

#data
<unknown u1="" xmlns="http://www.w3.org/1999/xhtml"></unknown>
#errors
/unknown;element not defined;m
/unknown/@u1;attribute not defined;m

#data
<unknown u1="" xml:lang="!" xmlns="http://www.w3.org/1999/xhtml"></unknown>
#errors
/unknown;element not defined;m
/unknown/@lang;langtag:language:nosemantics;m
/unknown/@lang;langtag:illegal;m
/unknown/@u1;attribute not defined;m

#data
<unknown class="" u1="" xml:lang="!" xmlns="http://www.w3.org/1999/xhtml"></unknown>
#errors
/unknown;element not defined;m
/unknown/@lang;langtag:language:nosemantics;m
/unknown/@lang;langtag:illegal;m
/unknown/@u1;attribute not defined;m