Oxygen XML Forum

Posted: **Tue Oct 04, 2011 1:03 am**

Hi,

I currently have includes in my docbook book to include
chapter files. I have two questions that may be related.

1) Here is an example:

<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="legalnotice.xml" />

I currently get the error:

Unexpected element "xi:include".

What do I need to do to address this validation error. I have Xinclude processing enabled in the preferences.

2) In the Oxygen editor, is there a way to expand all my includes in
a single editor screen as if it were a single file and be able to edit them...while in Text mode? I know this was possible when using file entities with Epic.

Thanks,
Paul

Posted: **Tue Oct 04, 2011 10:13 am**

Hi Paul,

1) Here is an example:
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="legalnotice.xml" />
I currently get the error:
Unexpected element "xi:include".
What do I need to do to address this validation error. I have Xinclude processing enabled in the preferences.

You are probably using the DTD-based Docbook 4.

For Docbook 4 your XML document's header should look like:

Code: Select all

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"

                      "http://www.docbook.org/xml/4.5/docbookx.dtd"

[ <!ENTITY % xinclude SYSTEM "http://www.docbook.org/xml/4.4/xinclude.mod">

%xinclude;

]>

<book>.....

The internal DTD subset is customized so that "xi:include" elements are allowed to occur in most Docbook elements.

For Docbook 5 (RNG based) the XML header should be like this:

Code: Select all

<?xml version="1.0" encoding="UTF-8"?>

<?xml-model href="http://www.oasis-open.org/docbook/xml/5.0/rng/docbookxi.rng" schematypens="http://relaxng.org/ns/structure/1.0"?>

<book xmlns="http://docbook.org/ns/docbook" 

        xmlns:xi="http://www.w3.org/2001/XInclude"

        xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0">...

It also points to a RNG schema which recognizes the xi:include elements.

To provide more details, DTD-based validation is made by the Xerces parser before the includes are expanded, so that's why they must be recognized by the associated DTDs.
RNG-based validation is made after the xi:includes are processed so there is no need for an xi:include aware RNG schema, but the schema is useful to provide content completion when inserting xi:includes.

2) In the Oxygen editor, is there a way to expand all my includes in
a single editor screen as if it were a single file and be able to edit them...while in Text mode? I know this was possible when using file entities with Epic.

No this is not possible.
In the Author page we show the xi:includes expanded but they are not editable. In order to edit them you can right click in the content and choose Edit Reference

Regards,
Radu

Posted: **Wed Oct 05, 2011 12:40 am**

Hi Radu,

Thanks much for your reply.

So, I added the new code that you suggested:

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"
[
<!ENTITY % all.entities SYSTEM "all-entities.ent">
%all.entities;
<!ENTITY % xinclude SYSTEM "http://www.docbook.org/xml/4.4/xinclude.mod">
%xinclude;
]>

And, I no longer get errors in the editor, but I do get
validation errors from our external validation script.

Attempt to load network entity http://www.docbook.org/xml/4.4/xinclude.mod

So, can I have two ENTITY entries for a book? Also,
http://www.docbook.org/xml/4.4/xinclude.mod doesn't seem to
resolve to anything.

Thanks,
Paul

Posted: **Wed Oct 05, 2011 9:12 am**

Hi Paul,

Oxygen uses XML catalogs (the default XML catalog which comes with the Docbook distribution) to map the reference:

"http://www.docbook.org/xml/4.4/xinclude.mod"

to a local module located here:
OXYGEN_INSTALL_DIR/frameworks/docbook/4.4/dtd/xinclude.mod

The main Docbook XML catalog located here:

OXYGEN_INSTALL_DIR/frameworks/docbook/catalog.xml

has this rewrite prefix rule:

Code: Select all

<rewriteSystem 

    systemIdStartString="http://www.docbook.org/xml/4.4/"

    rewritePrefix="4.4/dtd/"/>

So one way would be to add a catalog entry in your external validation script which maps the remote location to a local module.

Another way would be to expand the referenced module directly in the XML file like:

Code: Select all

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"

                         "http://www.docbook.org/xml/4.5/docbookx.dtd" [

 <!ELEMENT xi:include (xi:fallback?) >

 <!ATTLIST xi:include

 xmlns:xi            CDATA       #FIXED       "http://www.w3.org/2001/XInclude"

 href                CDATA       #REQUIRED

 parse               (xml|text)  "xml"

 xpointer            CDATA       #IMPLIED

 encoding            CDATA       #IMPLIED

 accept              CDATA       #IMPLIED

 accept-charset      CDATA       #IMPLIED

 accept-language     CDATA       #IMPLIED >

 <!ELEMENT xi:fallback ANY >

 <!ATTLIST xi:fallback

 xmlns:xi            CDATA       #FIXED "http://www.w3.org/2001/XInclude" >

 <!ENTITY % local.preface.class    "| xi:include" >

 <!ENTITY % local.part.class       "| xi:include" >

 <!ENTITY % local.chapter.class    "| xi:include" >

 <!ENTITY % local.section.class    "| xi:include" >

 <!ENTITY % local.divcomponent.mix "| xi:include" >

 <!ENTITY % local.para.char.mix    "| xi:include" >

 <!ENTITY % local.info.class       "| xi:include" >

 <!ENTITY % local.common.attrib    "xmlns:xi            CDATA       #FIXED       'http://www.w3.org/2001/XInclude'" >

<!ENTITY % local.common.attrib "xml:base CDATA #IMPLIED" >

]>

<book>....

But this is uglier.

Regards,
Radu

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