xmlcatalog: refresh man page wrt. quering system catalog easily

Also normalize "lookup" spelling.

Author: jnpkrn

doc/xmlcatalog.1

@@ -1,7 +1,7 @@
 '\" t
 .\"     Title: xmlcatalog
 .\"    Author: John Fleck <[email protected]>
-.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/>
+.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
 .\"      Date: $Date$
 .\"    Manual: xmlcatalog Manual
 .\"    Source: libxml2
@@ -34,7 +34,6 @@ xmlcatalog \- Command line tool to parse and manipulate XML or SGML catalog file
 \fBxmlcatalog\fR [\fB\-\-sgml\fR | \fB\-\-shell\fR | \fB\-\-create\fR | \fB\-\-del\ \fR\fB\fIVALUE(S)\fR\fR | [\ \fB\-\-add\ \fR\fB\fITYPE\fR\fR\fB\ \fR\fB\fIORIG\fR\fR\fB\ \fR\fB\fIREPLACE\fR\fR\fB\ \fR\ |\ \fB\-\-add\ \fR\fB\fIFILENAME\fR\fR] | \fB\-\-noout\fR | \fB\-\-no\-super\-update\fR | [\fB\-v\fR\ |\ \fB\-\-verbose\fR]] {\fICATALOGFILE\fR} {\fIENTITIES\fR...}
 .SH "DESCRIPTION"
 .PP
-
 \fBxmlcatalog\fR
 is a command line application allowing users to monitor and manipulate
 XML
@@ -50,7 +49,6 @@ SGML
 files\&.
 .SH "OPTIONS"
 .PP
-
 \fBxmlcatalog\fR
 accepts the following options (in alphabetical order):
 .PP
@@ -155,6 +153,19 @@ options\&.
 .RS 4
 Output debugging information\&.
 .RE
+.PP
+Invoking
+\fBxmlcatalog\fR
+non\-interactively without a designated action (imposed with options like
+\fB\-\-add\fR) will result in a lookup of the catalog entry for
+\fIENTITIES\fR
+in the catalog denoted with
+\fICATALOGFILE\fR\&. The corresponding entries will be output to the command line\&. This mode of operation, together with
+\fB\-\-shell\fR
+mode and non\-modifying (i\&.e\&. without
+\fB\-\-noout\fR) direct actions, allows for a special shortcut of the void
+\fICATALOGFILE\fR
+specification (possibly expressed as "" in the shell environment) appointing the default system catalog\&. That simplifies the handling when its exact location is irrelevant but the respective built\-in still needs to be consulted\&.
 .SH "SHELL COMMANDS"
 .PP
 Invoking
@@ -213,7 +224,7 @@ Quit the shell\&.
 .PP
 \fBpublic \fR\fB\fIPUBLIC\-ID\fR\fR
 .RS 4
-Execute a Formal Public Identifier look\-up of the catalog entry for
+Execute a Formal Public Identifier lookup of the catalog entry for
 \fIPUBLIC\-ID\fR\&. The corresponding entry will be output to the command line\&.
 .RE
 .PP
@@ -224,7 +235,7 @@ Stop printing debugging statements\&.
 .PP
 \fBsystem \fR\fB\fISYSTEM\-ID\fR\fR
 .RS 4
-Execute a Formal Public Identifier look\-up of the catalog entry for
+Execute a Formal Public Identifier lookup of the catalog entry for
 \fISYSTEM\-ID\fR\&. The corresponding entry will be output to the command line\&.
 .RE
 .SH "ENVIRONMENT"
@@ -240,7 +251,6 @@ catalog\&.
 .RE
 .SH "DIAGNOSTICS"
 .PP
-
 \fBxmlcatalog\fR
 return codes provide information that can be used when calling it from scripts\&.
 .PP

doc/xmlcatalog_man.xml

@@ -230,6 +230,21 @@
 		</varlistentry>
 
 	</variablelist>
+
+	<para>
+		Invoking &xmlcatalog; non-interactively without a designated action
+		(imposed with options like <option>--add</option>) will result in a lookup
+		of the catalog entry for <replaceable>ENTITIES</replaceable> in the
+		catalog denoted with <replaceable>CATALOGFILE</replaceable>. The
+		corresponding entries will be output to the command line. This mode of
+		operation, together with <option>--shell</option> mode and non-modifying
+		(i.e. without <option>--noout</option>) direct actions, allows for
+		a special shortcut of the void <replaceable>CATALOGFILE</replaceable>
+		specification (possibly expressed as &quot;&quot; in the shell
+		environment) appointing the default system catalog. That simplifies the
+		handling when its exact location is irrelevant but the respective built-in
+		still needs to be consulted.
+	</para>
 </refsect1>
 
 <refsect1 id="shell">
@@ -315,7 +330,7 @@
 	<term><option>public <replaceable>PUBLIC-ID</replaceable></option></term>
 	<listitem>
 		<para>
-			Execute a Formal Public Identifier look-up of the catalog entry
+			Execute a Formal Public Identifier lookup of the catalog entry
 			for <replaceable>PUBLIC-ID</replaceable>. The corresponding entry will be
 			output to the command line.
 		</para>
@@ -333,7 +348,7 @@
 	<term><option>system <replaceable>SYSTEM-ID</replaceable></option></term>
 	<listitem>
 		<para>
-			Execute a Formal Public Identifier look-up of the catalog entry
+			Execute a Formal Public Identifier lookup of the catalog entry
 			for <replaceable>SYSTEM-ID</replaceable>. The corresponding entry will be
 			output to the command line.
 		</para>