diff --git a/documentation/current/eiffelstudio/eiffelstudio-guided-tour/appendix-writing-documentation-filters-eff-eiffel-filter-format.wiki b/documentation/current/eiffelstudio/eiffelstudio-guided-tour/appendix-writing-documentation-filters-eff-eiffel-filter-format.wiki
index 0363b87c..96cc8cc5 100644
--- a/documentation/current/eiffelstudio/eiffelstudio-guided-tour/appendix-writing-documentation-filters-eff-eiffel-filter-format.wiki
+++ b/documentation/current/eiffelstudio/eiffelstudio-guided-tour/appendix-writing-documentation-filters-eff-eiffel-filter-format.wiki
@@ -69,14 +69,14 @@ Symbol
Tab
-Most of these denote Eiffel constructs as they appear in the official language reference, the book [http://www.eiffel.com/doc/ Eiffel: The Language] . Since the Eiffel construct names Feature, Invariant and Obsolete are also keywords and EFF, like Eiffel, is case-insensitive, the EFF construct names use the suffix _clause, for example Feature_clause.
+Most of these denote Eiffel constructs as they appear in the official language reference, the book [[Eiffel: The Language]] . Since the Eiffel construct names Feature, Invariant and Obsolete are also keywords and EFF, like Eiffel, is case-insensitive, the EFF construct names use the suffix _clause, for example Feature_clause.
The constructs corresponding to syntactic constructs are self-explanatory. The others are:
* Class_end, denoting the final end of a class text.
-* Keyword, denoting any Eiffel keyword among those listed in boldface in the corresponding appendix in [http://www.eiffel.com/doc/ Eiffel: The Language]
+* Keyword, denoting any Eiffel keyword among those listed in boldface in the corresponding appendix in [[Eiffel: The Language]]
* New_line, denoting any passage to a new line in the class text.
* Suffix, used to introduce the file extension for the generated documentation files. If you don't specify this, EiffelStudio will use the filter's name as extension.
-* Symbol, denoting any of the Eiffel symbols listed in the corresponding appendix of [http://www.eiffel.com/doc/ Eiffel: The Language] .
+* Symbol, denoting any of the Eiffel symbols listed in the corresponding appendix of [[Eiffel: The Language]] .
* Escape, to protect special characters of the external tool, as explained below.
* Tab, denoting any tab character appearing in the class text.