Implemented basic external transform function

* "InputXSLT:transform" expects two input arguments and executes the given transformation into the given target file
** this function respresents a important step in the direction of making it possible to write an actual static site generator on top of InputXSLT using XSLT
* added basic "transform" test case
* updated README.md to include this new function

1 files changed, 35 insertions, 0 deletions

diff --git a/test/transform/reference.xml b/test/transform/reference.xml
new file mode 100644
index 0000000..37c060e
--- /dev/null
+++ b/test/transform/reference.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<test_case>
+<transform>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
+&lt;xsl:stylesheet
+	version="1.0"
+	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+	xmlns:InputXSLT="function.inputxslt.application"
+	exclude-result-prefixes="InputXSLT"
+&gt;
+
+&lt;xsl:output
+	method="xml"
+	omit-xml-declaration="no"
+	encoding="UTF-8"
+	indent="yes"
+/&gt;
+
+&lt;xsl:template match="/"&gt;
+&lt;test_case&gt;
+	&lt;transform&gt;
+		&lt;xsl:variable
+			name   = "result"
+			select = "InputXSLT:transform('test.xsl', 'test_actual.xml')"
+		/&gt;
+
+		&lt;xsl:value-of select="
+			InputXSLT:read-xml-file('test_actual.xml')/test_case/transform_test
+		"/&gt;
+	&lt;/transform&gt;
+&lt;/test_case&gt;
+&lt;/xsl:template&gt;
+
+&lt;/xsl:stylesheet&gt;
+</transform>
+</test_case>