Consider the following DTD (Document Type Definition) schema rules.

<!ELEMENT customer (#PCDATA)> <!ELEMENT item (#PCDATA)>
Along with these, which of the DTD schema rules below correctly defines an XML order element that may contain any number of item elements, but must always contain a customer element?

Question

Consider the following DTD (Document Type Definition) schema rules.


        <!ELEMENT customer (#PCDATA)>
        <!ELEMENT item (#PCDATA)>

Along with these, which of the DTD schema rules below correctly defines an XML order element that may contain any number of item elements, but must always contain a customer element?

Answer

<!ELEMENT order (customer?, item*)>

Answer

<!ELEMENT order (customer, item*)>

Answer

<!ELEMENT order (customer | item*)>

Answer

<!ELEMENT order (customer, item?)>

Crowdly

Consider the following DTD (Document Type Definition) schema rules. ...

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