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Subject: Re: [docbook-apps] Font problem - need 2 font files in Docbook

This is not a restriction of DocBook.  Normally the font-family property in XSL-FO 
output is populated with a comma-separated list of fonts, not a single font.  The 
'body.fontset' internal parameter is used for body text, and it is set in 
fo/pagesetup.xsl by combining the body.font.family value and the symbol.font.family 
value, as described here:


So this should already be working for you.  Can you take a peek inside your FO output 
and see what the value of the font-family property on fo:root looks like?  It should 
include your body font and symbol font in the list.  If you are overriding the 
'body.fontset' parameter, then you may not get a list.

When XEP looks for a character, if it can't find one in the body font, it should then 
look in the next font in the list.  That is, if 
font-selection-strategy="character-by-character" is also set (it is by default, in the 
'root.properties' attribute set in param.xsl).

Bob Stayton
Sagehill Enterprises

----- Original Message ----- 
From: "Ron Catterall" <ron@catterall.net>
To: "docbook-apps" <docbook-apps@lists.oasis-open.org>
Sent: Saturday, June 05, 2010 8:00 AM
Subject: [docbook-apps] Font problem - need 2 font files in Docbook

> Am I missing something or is this a real restriction in Docbook
> In text body I have two symbols which (as far as I can see) never occur in the same 
> font file - specifically the old english yogh (&#x021D;) and the logical symbol 
> implies (&#x21D2; ISOtech suggests using this for 'implies').  (Gentium say that 
> eventually they will both be included, but  not yet.)
> Using XEP 4.18, in my xep.xml file I have:
>       <font-family name="Symbol">
>         <font><font-data afm="Symbol.afm"/></font>
>       </font-family>
> which contains 'implies' (&#x21D2;) and is built in to Acrobat and
>       <font-group xml:base="file:/Library/Fonts/" label="TrueType" embed="true">
>       <font-family name="Cardo">
>         <font><font-data ttf="Cardo98s.ttf"/></font>
>       </font-family>
> which I embed in the PDF output and which contains 'yogh' (&#x021D;)
> In my Docbook customization file I have:
> <xsl:param name="body.font.family" select="'Cardo'" />
> <xsl:param name="body.font.size" select="'11pt'" />
> <xsl:param name="title.font.family" select="'Cardo'" />
> <xsl:param name="footnote.font.size" select="'90%'" />
> <xsl:param name="footnote.font.family" select="'Cardo'" />
> <xsl:param name="alignment" select="'justify'" />
> in the PDF output 'yogh' appears correctly, but 'implies' does not.
> If I reset body.font.family to the Docbook default (eliminating the above 
> customization) I get the 'implies' (&#x21D2;) correctly, but lose the 'yogh' 
> (&#x021D;)
> I have entities defined and know that the entity file is accessed.
> <!ENTITY  yogh "&#x021D;">    <!--   lower case yogh -->
> <!ENTITY  rArr "&#x21D2;">    <!-- rightwards double arrow -->
> I cannot see any way in Docbook to change the body.font.family for a single body 
> character, or to specify a secondary body.font.family to be used if a character is 
> not found in the first one.
> -- 
> Ron Catterall Ph.D. D.Sc.
> ron@catterall.net
> http://catterall.net

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