[xep-support] text positioning differences between XEP 3.6.3 and 3.7.x

From: MAISONNY Benoit (Benoit.MAISONNY@eurocontrol.int)
Date: Wed Mar 24 2004 - 04:20:24 PST

  • Next message: Alexander Peshkov: "Re: [xep-support] text positioning differences between XEP 3.6.3 and 3.7.x"


    We compared the AT files produced from the same FO file using different versions of XEP, and found differences in the positioning and width of elements. For example:

    xep363: <xep:text value="Copyright " x="332218" y="46987" width="36456"/>
    xep372: <xep:text value="Copyright " x="332386" y="46989" width="36440"/>

    In some cases, the differences in "y" value can amount to 10000. The difference in width is probably the cause of the positioning differences. Perhaps you changed the algorithm to compute the characters' size?

    Of course, we are using the same fonts.xml file, on the same computer, to compare results.

    Is there a way to avoid these differences? We need to find which pages have changed between 2 versions of a document, and we are using the AT format to spot any difference. But in this case, the differences on the page are due to XEP, not to any change in content.

    Benoit Maisonny

    Benoit MAISONNY benoit.maisonny@eurocontrol.int
    eAIP development & support http://www.eurocontrol.int/ais/eaip
    EUROCONTROL Aeronautical Information Management


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