Index: openacs-4/packages/xowf/xowf.info
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowf/xowf.info,v
diff -u -r1.11 -r1.12
--- openacs-4/packages/xowf/xowf.info	1 Aug 2018 08:09:38 -0000	1.11
+++ openacs-4/packages/xowf/xowf.info	20 Jan 2019 20:44:07 -0000	1.12
@@ -10,15 +10,15 @@
     <inherit-templates-p>t</inherit-templates-p>
     <auto-mount>xowf</auto-mount>
     
-    <version name="5.10.0d4" url="http://openacs.org/repository/download/apm/xowf-5.10.0d4.apm">
+    <version name="5.10.0d5" url="http://openacs.org/repository/download/apm/xowf-5.10.0d5.apm">
         <owner url="mailto:neumann@wu-wien.ac.at">Gustaf Neumann</owner>
         <summary>XoWiki Content Flow - an XoWiki based workflow system implementing state-based behavior of wiki pages and forms</summary>
         <release-date>2017-08-06</release-date>
         <vendor url="http://wu.ac.at">WU Vienna</vendor>
         <maturity>2</maturity>
 
-        <provides url="xowf" version="5.10.0d4"/>
-        <requires url="xowiki" version="5.10.0d16"/>
+        <provides url="xowf" version="5.10.0d5"/>
+        <requires url="xowiki" version="5.10.0d18"/>
 	<requires url="acs-automated-testing" version="5.10.0d9"/>
 
         <callbacks>
Index: openacs-4/packages/xowf/tcl/xowf-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowf/tcl/xowf-procs.tcl,v
diff -u -r1.27 -r1.28
--- openacs-4/packages/xowf/tcl/xowf-procs.tcl	7 Oct 2018 11:39:57 -0000	1.27
+++ openacs-4/packages/xowf/tcl/xowf-procs.tcl	20 Jan 2019 20:44:07 -0000	1.28
@@ -956,7 +956,7 @@
   }
   Condition instproc defaultmethod {} {
     set obj [[:wf_context] object]
-    expr [:expr]
+    expr ${:expr}
   }
 
   #{label "#xowf.form-button-[namespace tail [self]]#"}
@@ -1129,6 +1129,14 @@
     }
   }
 
+  WorkflowPage instproc evaluate_form_field_condition {cond} {
+    set ctx [::xowf::Context require [self]]
+    if {[info commands ${ctx}::$cond] ne ""} {
+      return [${ctx}::$cond]
+    }
+    return 0
+  }
+
   WorkflowPage ad_instproc render_form_action_buttons_widgets {{-CSSclass ""} buttons} {
     With the given set of buttons, produce the HTML for the button
     container and the included inputs.