Hi, I'm Mikhail Edoshin and this is my first post to the list. I'm trying to write a few XSLT Extension element for various purposes and I'm not quite sure if the behavior I'm observing is expected or I should submit a bug request. Please help. Here's the situation: I want to write an element to create a directory, e.g.: <path:make-directory target="{$target}" /> The $target variable is supposed to be defined by the XSLT processor. The problem is that I cannot evaluate this expression or have it evaluated with apply_templates() or something like. Here's what I've tried: 1. First, I can have it evaluated if I provide a child element and use process_children(): <path:make-directory> <target value="{$target}" /> </path:make-directory> This construction works perfectly and for now I'm using it, but it's less elegant, of course, than having it in an attribute. 2. I see that XPaths do not work with self_node or input_node, but I don't quite understand why. I realize these elements are read-only, but applying an XPath isn't going to change them, is it? Besides, it seems that I can use context.context_node, which is same as input_node, but is not read-only and thus can run any XPath or whatever. This is good to have, although in my case it doesn't help, because I'd like to evaluate a XSLT variable. 3. For the remaining tests I prepared the following example: <path:make-directory> <xsl:text>sample text</xsl:text> <xsl:value-of select="$target" /> </path:make-directory> - If I use process_children(), it evaluates as expected: 'sample text', then the value of $target. - If I try to apply_templates() to the extension itself, I only get 'sample text'. - If I try to apply_templates() to each child element alone (using 'for item in self_node') I seem to a) skip the <xsl:text> element and b) I get no result. (From what I understand <xsl:text> is probably translated directly to text content (text or tail); if so, it's OK, as I'm more concerned about missing xsl:value-of.) - If I try to create a new xsl:text and apply_templates() to it, I get the text content of the element. - If I try to create a new xsl:value-of and apply_templates() to it, I get no result. - If I try to create an arbitrary element (with sub-elements, etc.) and apply_templates() to it, I only get element texts, if any; if there's no text, I get nothing. - Also, if I try to run process_children() without output_node, I get an error: TypeError: invalid argument type <type 'NoneType'> So, basically, what seems to be wrong is that: - XPaths do not work with self_node and input_node. - apply_templates() only adds text content, not elements or attributes. - process_children() does not accept None for output_element (contrary to the documentation). The two latter sound like bugs to me, but I'm not sure about the XPath limitation. Kind regards, Mikhail