[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: top level xsl:param confusion
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Robert, I think the part of the spec you're looking for is here: http://www.w3.org/TR/xpath#function-boolean You pass in an empty Sting that is converted to a boolean using the boolean() function in xsl:when/@test. As described in the spec referenced above, boolean("") returns false (<quote>a string is true if and only if its length is non-zero</>) hth, Wolfgang Robert Koberg wrote: | Hi, | | | I have a top level param like so: | | <xsl:param name="permission" select="false()"/> | | | Main Question: | | Is the above top level xsl:param considered false even if it was passed | an empty string? I would expect it to be false only if the param was | *not* passed. | | | More info: | | I send the param down to the transformation if a user has access to the | filesystem otherwise it is not sent. And if they have access I send the | path that they are restricted to as the value. Some example values are: | | "" -- full project access | "foo" -- access restricted to the 'foo' folder | "foo/bar" -- access restricted to the 'foo/bar' folder | | If they have no restriction I want the param value to be 'false()' | | The problem (or my misunderstanding) is when I pass down the empty | string value - "". So the transformation sees there is a | /xsl:stylesheet/xsl:param[@name='permission'] - so it should not | evaluate to false(), right? However, it does in both Xalan and Saxon | (the only two I tried). I don't see anything in the spec that addresses | this. | | For example, the following chooses the otherwise when the param is sent | to the transformation as an empty string. | | <xsl:choose> | <!--<xsl:when test="boolean($permission)"> or --> | <xsl:when test="$permission"> | <!-- allow access --> | </xsl:when> | <xsl:otherwise> | <!-- no access --> | </xsl:otherwise> | </xsl:choose> | | thanks for any clarification, | -Rob | | | -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (Cygwin) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFBXHhJqjaicDyx8o8RAgH4AJ4whqm3m54XWs5ofyS0ke+2AN8L4gCeJGOg PbkVtjvtxTpeNltKCrg5xrs= =n8Ol -----END PGP SIGNATURE-----
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