doc: Give engine sections an ident and remove the mark with that ident.

* doc/modules/skribilo/documentation/api.scm (doc-markup): Refer to
  engines by `ident' instead of by `mark'.

* doc/user/compiler.skb, doc/user/engine.skb, doc/user/links.skb,
  doc/user/package.skb, doc/user/sectioning.skb: Update references
  accordingly.
* doc/user/contexte.skb, doc/user/htmle.skb, doc/user/infoe.skb,
  doc/user/latexe.skb, doc/user/loute.skb, doc/user/xmle.skb: Give
  sections an ident, and remove the mark.

11 files changed, 20 insertions, 27 deletions

diff --git a/doc/user/compiler.skb b/doc/user/compiler.skb
index 8bb4bbd..e4f14e6 100644
--- a/doc/user/compiler.skb
+++ b/doc/user/compiler.skb
@@ -1,7 +1,7 @@
 ;;; compiler.skb  --  The Skribilo compiler.
 ;;; -*- coding: iso-8859-1 -*-
 ;;;
-;;; Copyright 2008  Ludovic Courtès <ludo@gnu.org>
+;;; Copyright 2008, 2012  Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright 2001, 2002, 2003, 2004  Manuel Serrano
 ;;;
 ;;;
@@ -106,7 +106,7 @@ compatible implementation is provided.])
 search path (see ,(numref :text [Section] :ident "sui") for details).])
 
 	`(#\b "base" ,[Strip ,(tt [base]) (an arbitrary string,
-typically an URL) from all hyperlinks when producing ,(ref :mark
+typically an URL) from all hyperlinks when producing ,(ref :ident
 "html-engine" :text [HTML files]).])
 	`(#\e "expr" ,[Prepend ,(tt [expr]) to the list of expressions
 to be evaluated before the input document is processed.  ,(tt [expr]) is
diff --git a/doc/user/contexte.skb b/doc/user/contexte.skb
index 5c98f83..1c08688 100644
--- a/doc/user/contexte.skb
+++ b/doc/user/contexte.skb
@@ -1,7 +1,7 @@
 ;;; context.skb  --  Documentation of the ConTeXt engine.
 ;;; -*- coding: iso-8859-1 -*-
 ;;;
-;;; Copyright 2008  Ludovic Courtès <ludo@gnu.org>
+;;; Copyright 2008, 2012  Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;;
 ;;; This file is part of Skribilo.
@@ -23,8 +23,7 @@
 ;*---------------------------------------------------------------------*/
 ;*    Document                                                         */
 ;*---------------------------------------------------------------------*/
-(section :title "ConTeXt Engine" :file #t
-   (mark "context-engine")
+(section :title "ConTeXt Engine" :file #t :ident "context-engine"
    (index "ConTeXt" :note "Engine")
    
    (p [The ,(tt [context]) engine produces documents for the ,(ref :text
diff --git a/doc/user/engine.skb b/doc/user/engine.skb
index 3db9a55..f59387d 100644
--- a/doc/user/engine.skb
+++ b/doc/user/engine.skb
@@ -35,7 +35,7 @@ specifies the ,(emph [engine]) or ``back-end'' to be used, which is
 roughly a set of procedures that translate the input document into the
 output format.  For instance, passing ,(tt [--target=html]) to the
 compiler instructs it to produce an HTML document using the ,(ref :text
-(code "html") :mark "html-engine") engine.])
+(code "html") :ident "html-engine") engine.])
 
    (p [This chapter describes procedures allowing the manipulation of
 engines in Skribilo documents or modules (creation, customization,
diff --git a/doc/user/htmle.skb b/doc/user/htmle.skb
index 93b7f0e..3342088 100644
--- a/doc/user/htmle.skb
+++ b/doc/user/htmle.skb
@@ -1,7 +1,7 @@
 ;;; htmle.skb  --  Documentation of the HTML engine.
 ;;; -*- coding: iso-8859-1 -*-
 ;;;
-;;; Copyright 2008  Ludovic Courtès <ludo@gnu.org>
+;;; Copyright 2008, 2012  Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright 2003, 2004  Manuel Serrano
 ;;;
 ;;;
@@ -21,8 +21,7 @@
 ;;; along with Skribilo.  If not, see <http://www.gnu.org/licenses/>.
 
 
-(section :title "HTML Engine" :file #t
-   (mark "html-engine")
+(section :title "HTML Engine" :file #t :ident "html-engine"
    (index "HTML" :note "Engine")
 
    (p [The HTML engine produces---guess what!---HTML output.  It can be
diff --git a/doc/user/infoe.skb b/doc/user/infoe.skb
index 713be76..d11e0b6 100644
--- a/doc/user/infoe.skb
+++ b/doc/user/infoe.skb
@@ -1,7 +1,7 @@
 ;;; info.skb  --  Documentation of the Info engine.
 ;;; -*- coding: iso-8859-1 -*-
 ;;;
-;;; Copyright 2009  Ludovic Courtès <ludo@gnu.org>
+;;; Copyright 2009, 2012  Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;;
 ;;; This file is part of Skribilo.
@@ -19,8 +19,7 @@
 ;;; You should have received a copy of the GNU General Public License
 ;;; along with Skribilo.  If not, see <http://www.gnu.org/licenses/>.
 
-(section :title "Info Engine" :file #t
-   (mark "info-engine")
+(section :title "Info Engine" :file #t :ident "info-engine"
    (index "Info" :note "Engine")
 
    (p [The ,(tt [info]) engine produces GNU,(~)Info files for on-line
diff --git a/doc/user/latexe.skb b/doc/user/latexe.skb
index 4be0418..142731b 100644
--- a/doc/user/latexe.skb
+++ b/doc/user/latexe.skb
@@ -24,8 +24,7 @@
 ;*---------------------------------------------------------------------*/
 ;*    Document                                                         */
 ;*---------------------------------------------------------------------*/
-(section :title "LaTeX Engine" :file #t
-   (mark "latex-engine")
+(section :title "LaTeX Engine" :file #t :ident "latex-engine"
    (index "LaTeX" :note "Engine")
 
    (p [Not surprisingly, the LaTeX engine produces ,(ref :url
diff --git a/doc/user/links.skb b/doc/user/links.skb
index 7534f47..8793e15 100644
--- a/doc/user/links.skb
+++ b/doc/user/links.skb
@@ -1,7 +1,7 @@
 ;;; links.skb  --  Links and cross-references.
 ;;; -*- coding: iso-8859-1 -*-
 ;;;
-;;; Copyright 2008  Ludovic Courtès <ludo@gnu.org>
+;;; Copyright 2008, 2012  Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright 2003, 2004  Manuel Serrano
 ;;;
 ;;;
@@ -182,7 +182,7 @@ of a SUI file is:])
 
 (p [SUI files can be automatically produced by the Skribilo compiler.
 For instance, in order to produce the SUI file of this user
-manual, one should set the ,(ref :mark "html-engine" :text [,(tt
+manual, one should set the ,(ref :ident "html-engine" :text [,(tt
 [emit-sui]) HTML custom]) to ,(tt [#t]); a ,(tt [user.sui]) file will
 then be produced when the manual is compiled to HTML:]
 
diff --git a/doc/user/loute.skb b/doc/user/loute.skb
index 4015837..d26b0ed 100644
--- a/doc/user/loute.skb
+++ b/doc/user/loute.skb
@@ -20,9 +20,7 @@
 ;;; along with Skribilo.  If not, see <http://www.gnu.org/licenses/>.
 
 
-(section :title "Lout Engine" :file #t
-         
-   (mark "lout-engine")
+(section :title "Lout Engine" :file #t :ident "lout-engine"
    (index "Lout" :note "Engine")
 
    (p [The Lout engine produces documents for the ,(ref :text [Lout
@@ -35,7 +33,7 @@ compared to typical LaTeX installations, consuming less than 10,(~)MiB
 of disk space.])
    
    (p [Skribilo's Lout engine provides lots of customization
-opportunities (currently more than the ,(ref :mark "latex-engine" :text
+opportunities (currently more than the ,(ref :ident "latex-engine" :text
 [LaTeX engine])), which are shown below.  It also enhances Lout by
 adding new features: PDF bookmarks, high-level interface to the use of
 dropped capitals, improved paragraph indentation, etc.])
diff --git a/doc/user/package.skb b/doc/user/package.skb
index eed0b09..efd9a1d 100644
--- a/doc/user/package.skb
+++ b/doc/user/package.skb
@@ -203,7 +203,7 @@ customs.] :chapter "Engines")])
       (subsubsection :title [HTML Engine Customization]
    
 	 (p [,(tt [html-navtabs]) is to be used in conjunction with the
-,(ref :text (code "html-engine") :mark "html-engine")
+,(ref :text (code "html-engine") :ident "html-engine")
 engine.  Specifically, it adds the following new customization to this
 engine:])
 
diff --git a/doc/user/sectioning.skb b/doc/user/sectioning.skb
index f55bc23..ff9dfa2 100644
--- a/doc/user/sectioning.skb
+++ b/doc/user/sectioning.skb
@@ -1,7 +1,7 @@
 ;;; sectioning.skb  --  Sectioning markups
 ;;; -*- coding: iso-8859-1 -*-
 ;;;
-;;; Copyright 2007, 2008, 2009  Ludovic Courtès <ludo@gnu.org>
+;;; Copyright 2007, 2008, 2009, 2012  Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright 2003, 2004  Manuel Serrano
 ;;;
 ;;;
@@ -44,7 +44,7 @@
 	    `((:title [The title of the chapter.])
 	      (:html-title [The title of window of the HTML browser.])
 	      (:info-node ,[The title of the Info node (see ,(ref
-:text [Section about the Info engine] :mark "info-engine")).])
+:text [Section about the Info engine] :ident "info-engine")).])
 	      (:number [This argument controls the chapter number.
 A value of ,(tt "#t") means that Skribilo computes the chapter
 number. A value of ,(tt "#f") means that the chapter has no number.  A
@@ -80,7 +80,7 @@ used as the name of the file for this chapter.])
 (doc-markup 'section 
 	    `((:title [The title of the chapter.])
 	      (:info-node ,[The title of the Info node (see ,(ref
-:text [Section about the Info engine] :mark "info-engine")).])
+:text [Section about the Info engine] :ident "info-engine")).])
 	      (:number [This argument controls the chapter number.
 A value of ,(tt "#t") means that Skribilo computes the chapter
 number. A value of ,(tt "#f") means that the chapter has no number.  A
diff --git a/doc/user/xmle.skb b/doc/user/xmle.skb
index 1a609dc..b7c6ebe 100644
--- a/doc/user/xmle.skb
+++ b/doc/user/xmle.skb
@@ -1,7 +1,7 @@
 ;;; xmle.skb  --  The documentation of the XML engine
 ;;; -*- coding: iso-8859-1 -*-
 ;;;
-;;; Copyright 2008  Ludovic Courtès <ludo@gnu.org>
+;;; Copyright 2008, 2012  Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright 2003, 2004  Manuel Serrano
 ;;;
 ;;;
@@ -24,8 +24,7 @@
 ;*---------------------------------------------------------------------*/
 ;*    Document                                                         */
 ;*---------------------------------------------------------------------*/
-(section :title "XML Engine" :file #t
-   (mark "xml-engine")
+(section :title "XML Engine" :file #t :ident "xml-engine"
    (index "XML" :note "Engine")
 
    (p [The XML engine produces a simple XML representation of Skribilo