-Returns MIME type of the content of this file. It is either
-extension-based (see wxMimeTypesManager) or extracted from
-HTTP protocol Content-Type header.
+Returns anchor (if present). The term of {\bf anchor} can be easily
+explained using few examples:
+
+\begin{verbatim}
+index.htm#anchor /* 'anchor' is anchor */
+index/wx001.htm /* NO anchor here! */
+archive/main.zip#zip:index.htm#global /* 'global' */
+archive/main.zip#zip:index.htm /* NO anchor here! */
+\end{verbatim}
+
+Usually an anchor is presented only if the MIME type is 'text/html'.
+But it may have some meaning with other files;
+for example myanim.avi\#200 may refer to position in animation
+or reality.wrl\#MyView may refer to a predefined view in VRML.