html - POST vs post, GET vs get

Question

I realize that both will work, but is one more correct than the other?

<form method="POST" />

vs.

<form method="post" />

Why use one or the other?

Answer 1

W3C has tended towards lowercase for attribute names and values for a while.

For example section 4.11 of the xhtml 1.0 standard in 2002:

4.11. Attributes with pre-defined value sets

HTML 4 and XHTML both have some attributes that have pre-defined and limited sets of values (e.g. the type attribute of the input element). In SGML and XML, these are called enumerated attributes. Under HTML 4, the interpretation of these values was case-insensitive, so a value of TEXT was equivalent to a value of text. Under XML, the interpretation of these values is case-sensitive, and in XHTML 1 all of these values are defined in lower-case.