In XML we can specify the frequency of an element by using the symbols :
2015
In XML we can specify the frequency of an element by using the symbols :
- A.
+*!
- B.
#*!
- C.
+*?
- D.
-*?
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Correct answer: C
Correct answer: +*?
These three symbols are occurrence indicators used in XML DTD content models to specify how many times an element can appear.
? : zero or one occurrence
* : zero or more occurrences
+ : one or more occurrences
Example: using these in a content model looks like (item)? for optional, (item)* for zero or more, and (item)+ for one or more occurrences.