diff -r 787ba1d19d3a -r 52cb065aa916 src/Pure/Thy/present.ML
--- a/src/Pure/Thy/present.ML	Wed Nov 18 15:41:02 2020 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,76 +0,0 @@
-(*  Title:      Pure/Thy/present.ML
-    Author:     Makarius
-
-Theory presentation: HTML and LaTeX documents.
-*)
-
-signature PRESENT =
-sig
-  val document_html_name: theory -> Path.binding
-  val document_tex_name: theory -> Path.binding
-  val html_name: theory -> Path.T
-  val export_html: theory -> Command_Span.span list -> unit
-end;
-
-structure Present: PRESENT =
-struct
-
-(** artefact names **)
-
-fun document_name ext thy =
-  Path.explode_binding0 ("document/" ^ Context.theory_name thy ^ "." ^ ext);
-
-val document_html_name = document_name "html";
-val document_tex_name = document_name "tex";
-
-fun html_name thy = Path.basic (Context.theory_name thy ^ ".html");
-
-
-(* theory as HTML *)
-
-local
-
-fun get_session_chapter thy =
-  let
-    val session = Resources.theory_qualifier (Context.theory_long_name thy);
-    val chapter = Resources.session_chapter session;
-  in (session, chapter) end;
-
-fun theory_link thy thy' =
-  let
-    val ((session, chapter), (session', chapter')) = apply2 get_session_chapter (thy, thy');
-    val link = html_name thy';
-  in
-    if session = session' then link
-    else if chapter = chapter' then Path.parent + Path.basic session' + link
-    else Path.parent + Path.parent + Path.basic chapter' + Path.basic session' + link
-  end;
-
-fun theory_document symbols A Bs body =
-  HTML.begin_document symbols ("Theory " ^ A) ^ "\n" ^
-  HTML.command symbols "theory" ^ " " ^ HTML.name symbols A ^ "<br/>\n" ^
-  (if null Bs then ""
-   else
-    HTML.keyword symbols "imports" ^ " " ^
-      space_implode " " (map (uncurry HTML.href_path o apsnd (HTML.name symbols)) Bs) ^ "<br/>\n") ^
-  "\n</div>\n<div class=\"source\">\n<pre class=\"source\">" ::
-  body @ ["</pre>\n", HTML.end_document];
-
-in
-
-fun export_html thy spans =
-  let
-    val name = Context.theory_name thy;
-    val parents =
-      Theory.parents_of thy |> map (fn thy' =>
-        (Url.File (theory_link thy thy'), Context.theory_name thy'));
-
-    val symbols = Resources.html_symbols ();
-    val keywords = Thy_Header.get_keywords thy;
-    val body = map (HTML.present_span symbols keywords) spans;
-    val html = XML.blob (theory_document symbols name parents body);
-  in Export.export thy (document_html_name thy) html end
-
-end;
-
-end;