Re: [xep-support] Stretchable no break space

From: Jirka Kosek (
Date: Wed Sep 15 2004 - 13:28:31 PDT

  • Next message: David Tolpin: "Re: [xep-support] Stretchable no break space"

    David Tolpin wrote:

    > There was a customer who complained that certain authors use
    > non-breaking spaces for text-indent, and, according to the
    > specification, they should not collapse.

    If it were on 1st April I would though that you must be joking. XML is
    not typewriter. But it is September now. Sigh! I thought that these
    typewriter guys are using MS Word these days. >:-(

    > A consequence is that they are not stretched when they text is
    > justified. I am not sure it is the right result, but, at least,
    > it is simple and consistent. Anything that is not an XML space
    > is not a space in XSL FO.

    I tried to find some information about this issue in XSL FO spec. Here
    are my conclusions. From the description of the treat-as-word-space
    property it is clear that U+00A0 should be stretched according to
    word-spacing in the same way as the U+0020. This applies to characters
    that are inserted using <fo:character/>. And the description of
    <fo:character/> says that each character in a result tree is treated as
    if it were corresponding <fo:character/>. In this light my
    interpretation of spec is that U+00A0 should stretch.

    Of course there might be different interpretations. We can ask XSL-FO WG
    for their opinion about this issue.

    > A solution would be to take each sequence of words joined by &#160;s
    > into <fo:inline keep-together.within-line="always">V lese</fo:inline>.

    Unfortunately this is not suitable solution. It forbids line-breaks
    inside "lese" word (there might be longer words more suitable for
    hyphenation in practice). And also converting from &nbsp; to this format
    is doable in XSLT but very complex if you want to handle cases where
    input document looks like


    and it is processed by several XSLT templates (for text node and for
    emphasis element node). And once you are using xsl:value-of instead
    xsl:apply-templates to pull data from input XML you don't have decent
    chance to surround them by construct you are suggesting.

    > If it works for you, use it. If it does not, I need a consistent
    > approach, or we'll end up applying the same change back and forth.

    If my interperation of XSL-FO is correct I would appreciate fix in XEP.
    If not, would it be possible to add an extension property to switch
    between different modes for U+00A0? Something like



       Jirka Kosek     e-mail:
       Profesionální školení a poradenství v oblasti technologií XML.
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