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-rw-r--r--manual/CHAPTER_Overview.tex7
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diff --git a/manual/CHAPTER_Overview.tex b/manual/CHAPTER_Overview.tex
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@@ -193,6 +193,13 @@ Violating these rules results in a runtime error.
All RTLIL identifiers are case sensitive.
+Some transformations, such as flattening, may have to change identifiers provided by the user
+to avoid name collisions. When that happens, attribute ``{\tt hdlname}`` is attached to the object
+with the changed identifier. This attribute contains one name (if emitted directly by the frontend,
+or is a result of disambiguation) or multiple names separated by spaces (if a result of flattening).
+All names specified in the ``{\tt hdlname}`` attribute are public and do not include the leading
+``\textbackslash``.
+
\subsection{RTLIL::Design and RTLIL::Module}
The RTLIL::Design object is basically just a container for RTLIL::Module objects. In addition to