xml with no -->"<?xml version?>"

I have a basic question:

Can the xml begin without having line "<?xml version="1.0" 
encoding="UTF-8"?>"

I created the following xml, and validated from xmpspy?
<Person>
	<name>aaa</name>
	<phone>123</phone>
</Person>

Is the above considered as proper xml?



Thank you.

Sudheshna

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