diff --git a/search_index.json b/search_index.json
index 7bf6059..45e6f91 100644
--- a/search_index.json
+++ b/search_index.json
@@ -21,7 +21,7 @@
     {
       "location": "themes.htm",
       "breadcrumbs": "Home / Authoring content / Themes",
-      "keywords": "a A all and are as based be been below bin binary bread Breadcrumbs build built by called can certain chosen coded command contains Content copied copy could couple create created crumbs css current data debug default Default definitions delimited described Destination development docnet Docnet DocNet docnetjson e each easier etc executable expects extra ExtraScript file files fill folder folders Footer footers for form from g generated get given hard has have headers however href htm HTML if in including is isn It js json junction li like link list loaded located location look make making manually markdown marker markers means MkDocs mklink more name Name names navigation no of on one or output page pages Pages PageTemplate path Path place present produce prompt reach ReadTheDocs references rel relative release replace replaced repository representing required script search shipped should simple some source specific specified specifying started structure stylesheet template text that the The theme themes Themes then there These this This through title to To ToC TopicTitle tree type ul up URL URLs used uses using value whatever where which will windows with within won work you You your zero",
+      "keywords": "a A all and are as based be been below bin binary bread Breadcrumbs build built by called can certain chosen coded command contains Content copied copy could couple create created crumbs css current data debug default Default definitions delimited described Destination development docnet Docnet DocNet docnetjson e each easier etc executable expects extra ExtraScript file files fill folder folders Footer footers for form from g generated get given hard has have headers however href htm HTML if in including is isn It js json junction li like link list loaded located location look make making manually markdown marker markers means MkDocs mklink more name Name names navigation no of on one or output page pages Pages PageTemplate path Path place present produce prompt reach ReadTheDocs references rel relative RelativeSourceFileName RelativeTargetFileName release replace replaced repository representing required root script search shipped should simple some source specific specified specifying started structure stylesheet target template text that the The theme themes Themes then there These this This through title to To ToC TopicTitle tree type ul up URL URLs used uses using value whatever where which will windows with within won work you You your zero",
       "title": "Themes"
     },
     {
diff --git a/themes.htm b/themes.htm
index e8378c3..8eb9e84 100644
--- a/themes.htm
+++ b/themes.htm
@@ -97,6 +97,8 @@
 <li><code>{{TopicTitle}}</code>. This is replaced with the title of the page, which is the value specified as name in the <code>Pages</code> tree. </li>
 <li><code>{{Footer}}</code>. This is replaced with the value specified in <code>Footer</code> in the docnet.json file. </li>
 <li><code>{{Breadcrumbs}}</code>. This is replaced with a / delimited list of names making up the bread crumbs representing the navigation through the ToC to reach the current page. </li>
+<li><code>{{RelativeSourceFileName}}</code>. This is replaced with the source file name relative to the root folder. </li>
+<li><code>{{RelativeTargetFileName}}</code>. This is replaced with the target file name relative to the output folder. </li>
 <li><code>{{ExtraScript}}</code>. This is replaced with extra script definitions / references required by some pages, like the search page. It's <code>docnet</code> specific and if this marker isn't present, search won't work.</li>
 <li>
 <code>{{Path}}</code>. This is used to fill in the relative path to reach css/js files in hard-coded URLs in the <code>PageTemplate</code> file. This means that specifying a css URL in <code>PageTemplate</code> should look like: