Which internal DTD specifies the structure of the following XML document?
- <!DOCTYPE Messages [
<!ELEMENT Messages (mail)>
<!ELEMENT mail (subject)>
<!ELEMENT mail EMPTY>]>
- <!DOCTYPE mail [
<!ELEMENT Messages (mail)>
<!ELEMENT mail (subject)>
<!ELEMENT subject EMPTY>]>
- <!DOCTYPE Messages [
<!ELEMENT Messages (subject)>
<!ELEMENT mail (subject)>
<!ELEMENT subject EMPTY>
- <!DOCTYPE Messages [
<!ELEMENT Messages (mail)>
<!ELEMENT mail (subject)>
<!ELEMENT subject EMPTY>
The correct answer is:
- <!DOCTYPE Messages [
<!ELEMENT Messages (mail)>
<!ELEMENT mail (subject)>
<!ELEMENT subject EMPTY>