--- a/svghmi/gen_index_xhtml.xslt	Thu Oct 22 22:44:29 2020 +0200
+++ b/svghmi/gen_index_xhtml.xslt	Wed Oct 28 18:21:12 2020 +0200
@@ -3826,7 +3826,9 @@
   <xsl:template mode="widget_class" match="widget[@type='JsonTable']">
     <xsl:text>class JsonTableWidget extends Widget{
 </xsl:text>
-    <xsl:text>    cache = [100,50];
+    <xsl:text>    // arbitrary defaults to avoid missing entries in query
+</xsl:text>
+    <xsl:text>    cache = [0,100,50];
 </xsl:text>
     <xsl:text>    do_http_request(...opt) {
 </xsl:text>
@@ -3840,6 +3842,8 @@
 </xsl:text>
     <xsl:text>            visible: this.visible,
 </xsl:text>
+    <xsl:text>            extra: this.cache.slice(4),
+</xsl:text>
     <xsl:text>            options: opt
 </xsl:text>
     <xsl:text>        };
@@ -4177,8 +4181,6 @@
 </xsl:text>
     <xsl:text>        this.apply_hmi_value(3, this.visible);
 </xsl:text>
-    <xsl:text>        console.log(range,position,jdata);
-</xsl:text>
     <xsl:apply-templates mode="json_table_render_except_comments" select="$data_elt">
       <xsl:with-param name="expressions" select="$initexpr_ns"/>
       <xsl:with-param name="widget_elts" select="$hmi_element/*[@inkscape:label = 'data']/descendant::svg:*"/>

--- a/svghmi/widget_jsontable.ysl2	Thu Oct 22 22:44:29 2020 +0200
+++ b/svghmi/widget_jsontable.ysl2	Wed Oct 28 18:21:12 2020 +0200
@@ -3,13 +3,15 @@
 template "widget[@type='JsonTable']", mode="widget_class"
     ||
     class JsonTableWidget extends Widget{
-        cache = [100,50];
+        // arbitrary defaults to avoid missing entries in query
+        cache = [0,100,50];
         do_http_request(...opt) {
             const query = {
                 args: this.args,
                 range: this.cache[1],
                 position: this.cache[2],
                 visible: this.visible,
+                extra: this.cache.slice(4),
                 options: opt
             };
 
@@ -220,7 +222,6 @@
     |         this.apply_hmi_value(1, range);
     |         this.apply_hmi_value(2, position);
     |         this.apply_hmi_value(3, this.visible);
-    |         console.log(range,position,jdata);
     apply "$data_elt", mode="json_table_render_except_comments" {
         with "expressions","$initexpr_ns";
         with "widget_elts","$hmi_element/*[@inkscape:label = 'data']/descendant::svg:*";

--- a/tests/svghmi/plc.xml	Thu Oct 22 22:44:29 2020 +0200
+++ b/tests/svghmi/plc.xml	Wed Oct 28 18:21:12 2020 +0200
@@ -1,7 +1,7 @@
 <?xml version='1.0' encoding='utf-8'?>
 <project xmlns:ns1="http://www.plcopen.org/xml/tc6_0201" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://www.plcopen.org/xml/tc6_0201">
   <fileHeader companyName="Unknown" productName="Unnamed" productVersion="1" creationDateTime="2019-08-06T14:23:42"/>
-  <contentHeader name="Unnamed" modificationDateTime="2020-10-22T08:43:10">
+  <contentHeader name="Unnamed" modificationDateTime="2020-10-30T20:07:00">
     <coordinateInfo>
       <fbd>
         <scaling x="5" y="5"/>

--- a/tests/svghmi/py_ext_0@py_ext/pyfile.xml	Thu Oct 22 22:44:29 2020 +0200
+++ b/tests/svghmi/py_ext_0@py_ext/pyfile.xml	Wed Oct 28 18:21:12 2020 +0200
@@ -34,6 +34,7 @@
         range_feedback = newdata[u'range']
         slider_position = newdata[u'position']
         visible = newdata[u'visible']
+        extra = newdata[u'extra']
         options = newdata[u'options']
 
         if len(options) == 2 :
@@ -41,18 +42,22 @@
             if action == "onClick[acknowledge]":
                 AlarmIndex[int(alarmid)][2] = "ack"
 
-        answer = self.renderTable(range_feedback, slider_position, visible)
+        answer = self.renderTable(range_feedback, slider_position, visible, extra)
         janswer = json.dumps(answer)
         return janswer
 
-    def renderTable(self, old_range, old_position, visible):
-        new_range = len(Alarms)
+    def renderTable(self, old_range, old_position, visible, extra):
+        if len(extra) > 0 and extra[0] != "":
+            fAlarms = [alrm for alrm in Alarms if alrm[1].find(extra[0])!=-1]
+        else:
+            fAlarms = Alarms
+        new_range = len(fAlarms)
         delta = new_range - visible
         new_position = 0 if delta <= 0 else delta if old_position > delta else old_position
         new_visible = new_range if delta <= 0 else visible
         
         visible_alarms = []
-        for ts, text, status, alarmid in Alarms[new_position:new_position + new_visible]:
+        for ts, text, status, alarmid in fAlarms[new_position:new_position + new_visible]:
             visible_alarms.append({
                 "time": time.ctime(ts),
                 "text": text, # TODO translate text

--- a/tests/svghmi/svghmi_0@svghmi/svghmi.svg	Thu Oct 22 22:44:29 2020 +0200
+++ b/tests/svghmi/svghmi_0@svghmi/svghmi.svg	Wed Oct 28 18:21:12 2020 +0200
@@ -200,12 +200,12 @@
      inkscape:current-layer="hmi0"
      showgrid="false"
      units="px"
-     inkscape:zoom="0.38583842"
-     inkscape:cx="-56.535477"
-     inkscape:cy="77.476632"
-     inkscape:window-width="1920"
-     inkscape:window-height="1043"
-     inkscape:window-x="0"
+     inkscape:zoom="1.5433537"
+     inkscape:cx="-705.74041"
+     inkscape:cy="175.04058"
+     inkscape:window-width="3840"
+     inkscape:window-height="2123"
+     inkscape:window-x="1600"
      inkscape:window-y="0"
      inkscape:window-maximized="1"
      showguides="true"
@@ -5248,7 +5248,7 @@
        style="fill:#ffffff;stroke-width:1px">Alarm Page</tspan></text>
   <g
      id="g1289"
-     inkscape:label="HMI:JsonTable:/alarms@/ALARMNOTIFY@.range@.position"
+     inkscape:label="HMI:JsonTable:/alarms@/ALARMNOTIFY@.range@.position@.visibleAlarms@.filter"
      transform="matrix(0.5,0,0,0.5,-1757.3465,454.4367)">
     <g
        id="g5231"
@@ -5490,7 +5490,7 @@
        inkscape:label="disabled" />
   </g>
   <g
-     transform="matrix(0.33436432,0,0,0.33436432,-664.21063,278.8185)"
+     transform="matrix(0.33436432,0,0,0.33436432,-584.21063,278.8185)"
      inkscape:label="HMI:Input@/ALARMNOTIFY"
      id="g5222"
      style="stroke-width:0.75594342">
@@ -5695,7 +5695,7 @@
        inkscape:label="disabled" />
   </g>
   <g
-     transform="matrix(0.33436432,0,0,0.33436432,-1128.7703,278.8185)"
+     transform="matrix(0.33436432,0,0,0.33436432,-1048.7703,278.8185)"
      inkscape:label="HMI:Input@.range"
      id="g5222-3"
      style="stroke-width:0.75594342">
@@ -5757,7 +5757,7 @@
        sodipodi:type="star" />
   </g>
   <g
-     transform="matrix(0.33436432,0,0,0.33436432,-896.49047,278.8185)"
+     transform="matrix(0.33436432,0,0,0.33436432,-816.49047,278.8185)"
      inkscape:label="HMI:Input@.position"
      id="g5222-6"
      style="stroke-width:0.75594342">
@@ -5821,34 +5821,34 @@
   <text
      xml:space="preserve"
      style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:26.45700645px;line-height:125%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:center;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#ffffff;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
-     x="-1015.5838"
+     x="-935.5838"
      y="291.8042"
      id="text887"><tspan
        sodipodi:role="line"
        id="tspan885"
-       x="-1015.5838"
+       x="-935.5838"
        y="291.8042"
        style="fill:#ffffff;stroke-width:1px">range</tspan></text>
   <text
      id="text891"
      y="291.8042"
-     x="-782.87115"
+     x="-702.87115"
      style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:26.45700645px;line-height:125%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:center;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#ffffff;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
      xml:space="preserve"><tspan
        style="fill:#ffffff;stroke-width:1px"
        y="291.8042"
-       x="-782.87115"
+       x="-702.87115"
        id="tspan889"
        sodipodi:role="line">position</tspan></text>
   <text
      xml:space="preserve"
      style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:26.45700645px;line-height:125%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:center;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#ffffff;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
-     x="-551.33417"
+     x="-471.33417"
      y="291.8042"
      id="text895"><tspan
        sodipodi:role="line"
        id="tspan893"
-       x="-551.33417"
+       x="-471.33417"
        y="291.8042"
        style="fill:#ffffff;stroke-width:1px">notify</tspan></text>
   <g
@@ -6100,4 +6100,45 @@
        x="668.18188"
        y="242.50345"
        style="fill:#ffffff;fill-opacity:1;stroke-width:0.28590268px">8888</tspan></text>
+  <g
+     style="stroke-width:0.75594342"
+     id="g900"
+     inkscape:label="HMI:Input@.filter"
+     transform="matrix(0.33436432,0,0,0.33436432,-1288.7703,278.8185)">
+    <text
+       inkscape:label="value"
+       id="text892"
+       y="218.24219"
+       x="136.32812"
+       style="font-style:normal;font-weight:normal;font-size:160px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#ffffff;fill-opacity:1;stroke:none;stroke-width:0.75594342px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       xml:space="preserve"><tspan
+         style="stroke-width:0.75594342px"
+         y="218.24219"
+         x="136.32812"
+         id="tspan890"
+         sodipodi:role="line">8888</tspan></text>
+    <rect
+       style="color:#000000;clip-rule:nonzero;display:inline;overflow:visible;visibility:visible;opacity:0;isolation:auto;mix-blend-mode:normal;color-interpolation:sRGB;color-interpolation-filters:linearRGB;solid-color:#000000;solid-opacity:1;vector-effect:none;fill:#ff00ff;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:3.77971721;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker:none;color-rendering:auto;image-rendering:auto;shape-rendering:auto;text-rendering:auto;enable-background:accumulate"
+       id="rect896"
+       width="615.05096"
+       height="128"
+       x="139.85185"
+       y="95.40741"
+       onclick=""
+       inkscape:label="edit" />
+  </g>
+  <text
+     id="text904"
+     y="291.8042"
+     x="-1175.5837"
+     style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:26.45700645px;line-height:125%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:center;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#ffffff;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+     xml:space="preserve"><tspan
+       style="fill:#ffffff;stroke-width:1px"
+       y="291.8042"
+       x="-1175.5837"
+       id="tspan902"
+       sodipodi:role="line">filter</tspan></text>
+  <g
+     id="g909"
+     inkscape:label="HMI:VarInit:&quot;&quot;@.filter" />
 </svg>