automatically Match fields in word

Question

How does Microsoft Word match fields in MailMerge automatically?

For example:

Word searches for the column that matches each element. In the illustration, Word automatically matched the data file's Surname column to Last Name. But Word was unable to match other elements. From this data file, for example, Word can't match First Name or Address 1.

What fields did Word match automatically? Does it depend on regional options?

Some additional information about ADDRESSBLOCK:

• http://support.microsoft.com/kb/282594
• http://support.microsoft.com/kb/286875