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Getting a cookie value using EL  RSS feed

 
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hi
I am going through EL implicit objects. for getting a cookie value , given a name , page 386 of HFSJ (first edition) has this ${cookie.userName.value}
my question is why does this ".value" do at the end. Since cookie is a map of cookie name and value, shouldn't it be just ${cookie.userName} like using any other implicit object. eg: header
 
vani venkat
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Here is a good explanation i found after posting this question.
 
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found it useful
 
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