Subject: Re: [xsl] Initial whitespace in PI from XSLT, main body From: "Martin Honnen martin.honnen@xxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Sat, 7 May 2022 21:45:37 -0000 |
On 07.05.2022 23:14, Bauman, Syd s.bauman@xxxxxxxxxxxxxxxx wrote: > _Writing_ > But what if I try to /write/ a PI whose string value starts with one > or more whitespace characters? > > First, we know the processor is *required* to write out one or more > whitespace characters between the PITarget and the value string. I > presume (without knowing for sure) that the processor is welcome to > use whatever set of whitespace characters it wants to separate the > PITarget from the rest when it serializes a PI. (I have never seen nor > heard of a processor that uses anything other than a single space > (U+0020) character, myself.) I further suspect that most processors > would choose to not use any whitespace characters when serializing a > PI that does not have a value string. > > But if I am explicitly giving the processor a string to use as the > value of the PI that starts with space, I sort of expect that string, > including the leading space, to appear in the output after whatever > space the processor normally uses to separate a PITarget from a value > string. And that is the behavior I get from xsltproc.[B] > <https://bauman.zapto.org/~syd/temp/DSG/Initial_whitespace_in_PI_from_XSLT/Ap pendix_B_xsltproc_output.xml> > But it is not the behavior I get from Saxon.[C] > <https://bauman.zapto.org/~syd/temp/DSG/Initial_whitespace_in_PI_from_XSLT/Ap pendix_C_Saxon_output.xml> > > So is Saxon in error, or is xsltproc in error, or is the spec > ambiguous and either behavior is OK, or something else? > The relevant XSLT 3 spec section is https://www.w3.org/TR/xslt-30/#constructing-simple-content and clearly says "6. In the case of|xsl:processing-instruction| <https://www.w3.org/TR/xslt-30/#element-processing-instruction>, any leading spaces in the resulting string are removed."
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