-decimal digit, and end with @file{.xml}. Each of these members
-represents some kind of output item (a table, a heading, a block of
-text, etc.) or a group of them. The member whose output goes at the
-beginning of the document is numbered 0, the next member in the output
-is numbered 1, and so on.
+decimal digit, and end with @file{.xml}, and often include the string
+@file{_heading} in between. Each of these members represents some
+kind of output item (a table, a heading, a block of text, etc.) or a
+group of them. The member whose output goes at the beginning of the
+document is numbered 0, the next member in the output is numbered 1,
+and so on.