OK, I have tried these QL plugins, and some others.
The result is not up to my expectations. Currently, xml files (and even aup Audacity files) are displayed by QuickLook as text, without color, which is extremely fast, even for very large files. XSL files are not displayed.
With the plugin QLColorCode.qlgenerator, which is the best I found, the XML and XSL files are displayed, but in a very small icon that does not allow reading (it is too small). You have to press the space bar to see the file, but for a large file it takes a long time to display the content.
Actually, I don't need much. I'm not interested in colorization or syntax highlighting.
Without a new plugin, XML files are displayed by QuickLook as raw text, not in a small icon, but over the full width available in the Finder column. The .aup files (Audacity) also. I would just like the same to be true for .xsl files.
I guess there is somewhere a mapping table that I could modify so that the processing of .xsl would be the same as that of .xml ?
Thank's for your help !
Regards