=== modified file 'share/extensions/hpgl_output.py'
--- share/extensions/hpgl_output.py	2017-01-24 17:52:08 +0000
+++ share/extensions/hpgl_output.py	2017-03-04 12:38:29 +0000
@@ -45,7 +45,6 @@
         self.OptionParser.add_option('--precut',        action='store', type='inkbool', dest='precut',        default='TRUE',  help='Use precut')
         self.OptionParser.add_option('--flat',          action='store', type='float',   dest='flat',          default=1.2,     help='Curve flatness')
         self.OptionParser.add_option('--autoAlign',     action='store', type='inkbool', dest='autoAlign',     default='TRUE',  help='Auto align')
-        self.DOCROTATE = "{http://www.inkscape.org/namespaces/inkscape}document_rotation"
 
     def effect(self):
         self.options.debug = False
@@ -53,10 +52,11 @@
         svg = self.document.getroot()
         xpathStr = '//sodipodi:namedview'
         nv = svg.xpath(xpathStr, namespaces=NSS)
-        document_rotate = "0"
+        document_rotate = '0'
         if nv != []:
-            document_rotate = nv[0].get(self.DOCROTATE)
-            nv[0].set(self.DOCROTATE,"0")
+            document_rotate = nv[0].get(inkex.addNS('document-rotation', 'inkscape'))
+            if document_rotate != '0':
+                nv[0].set(inkex.addNS('document-rotation', 'inkscape'),"0")
         myHpglEncoder = hpgl_encoder.hpglEncoder(self)
         try:
             self.hpgl, debugObject = myHpglEncoder.getHpgl()
@@ -65,13 +65,13 @@
                 # issue error if no paths found
                 inkex.errormsg(_("No paths where found. Please convert all objects you want to save into paths."))
                 self.hpgl = ''
-                if nv != [] and document_rotate:
-                    nv[0].set("inkscape:document_rotation",document_rotate)
+                if nv != [] and document_rotate != '0':
+                    nv[0].set(inkex.addNS('document-rotation', 'inkscape'),document_rotate)
                 return
             else:
                 type, value, traceback = sys.exc_info()
-                if nv != [] and document_rotate:
-                    nv[0].set("inkscape:document_rotation",document_rotate)
+                if nv != [] and document_rotate != '0':
+                    nv[0].set(inkex.addNS('document-rotation', 'inkscape'),document_rotate)
                 raise ValueError, ("", type, value), traceback
         # convert raw HPGL to HPGL
         hpglInit = 'IN'
@@ -80,8 +80,8 @@
         if self.options.speed > 0:
             hpglInit += ';VS%d' % self.options.speed
         self.hpgl = hpglInit + self.hpgl + ';SP0;PU0,0;IN; '
-        if nv != [] and document_rotate:
-            nv[0].set("inkscape:document_rotation",document_rotate)
+        if nv != [] and document_rotate != '0':
+            nv[0].set(inkex.addNS('document-rotation', 'inkscape'),document_rotate)
 
     def output(self):
         # print to file

=== modified file 'share/extensions/synfig_output.py'
--- share/extensions/synfig_output.py	2016-11-05 21:29:03 +0000
+++ share/extensions/synfig_output.py	2017-03-04 19:58:54 +0000
@@ -1046,17 +1046,11 @@
 ###### Main Class #########################################
 class SynfigExport(SynfigPrep):
     def __init__(self):
-        svg = self.document.getroot()
-        xpathStr = '//http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd}:namedview'
-        res = svg.xpath(xpathStr, namespaces=inkex.NSS)
-        self.document_rotate =  res[0].get("inkscape:document_rotation")
-        res[0].set("inkscape:document_rotation","0")
         SynfigPrep.__init__(self)
 
     def effect(self):
         # Prepare the document for exporting
         SynfigPrep.effect(self)
-
         svg = self.document.getroot()
         width = get_dimension(svg.get("width", 1024))
         height = get_dimension(svg.get("height", 768))
@@ -1078,10 +1072,6 @@
             root_canvas.append(layer)
 
         d.get_root_tree().write(sys.stdout)
-        svg = self.document.getroot()
-        xpathStr = '//http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd}:namedview'
-        res = svg.xpath(xpathStr, namespaces=inkex.NSS)
-        res[0].set("inkscape:document_rotation",self.document_rotate)
 
     def convert_node(self, node, d):
         """Convert an SVG node to a list of Synfig layers"""