11 lines
146 B
XML
11 lines
146 B
XML
|
<!DOCTYPE doc [
|
||
|
|
<!ELEMENT doc (a?, (b, c?)?, d)>
|
||
|
|
<!ELEMENT a EMPTY>
|
||
|
|
<!ELEMENT b EMPTY>
|
||
|
|
<!ELEMENT c EMPTY>
|
||
|
|
<!ELEMENT d EMPTY>
|
||
|
|
]>
|
||
|
|
<doc>
|
||
|
|
<d/>
|
||
|
|
</doc>
|