Merge pull request #1105 from ndw/iss-1104

Clarify the description of the scope of step names

xproc/src/main/xml/specification.xml

@@ -3497,14 +3497,16 @@ an error.</para>
 
 <section>
   <title>Scoping of step names</title>
-<para>The scope of the names of the steps (the values of the step’s <code>name</code> attributes) is determined by
-the <glossterm>environment</glossterm> of each step. In general, the
-name of a step, the names of its sibling steps, the names of any steps
-that it contains directly, the names of its ancestors, and the names
-of the siblings of its ancestors are all in a common scope. <error
-code="S0002">All steps in the same scope <rfc2119>must</rfc2119> have
-unique names: it is a <glossterm>static error</glossterm> if two steps
-with the same name appear in the same scope.</error></para>
+
+<para>The scope of the names of the steps (the values of the step’s
+<code>name</code> attributes) is the step on which the name appears, the names
+of its sibling steps, the names of any steps that it contains directly, the
+names of its ancestors, and the names of the siblings of its ancestors.
+<error code="S0002">All steps in the same
+scope <rfc2119>must</rfc2119> have unique names: it is a <glossterm>static
+error</glossterm> if two steps with the same name appear in the same
+scope.</error></para>
+
 </section>
 <section>
   <title>Scoping of port names</title>