diff --git a/FHEM/98_structure.pm b/FHEM/98_structure.pm
new file mode 100755
index 000000000..df3b9bee5
--- /dev/null
+++ b/FHEM/98_structure.pm
@@ -0,0 +1,202 @@
+##############################################
+package main;
+
+use strict;
+use warnings;
+
+sub addToAttrList($);
+
+#####################################
+sub
+structure_Initialize($)
+{
+  my ($hash) = @_;
+
+  $hash->{DefFn}     = "structure_Define";
+  $hash->{UndefFn}   = "structure_Undef";
+
+  $hash->{SetFn}     = "structure_Set";
+  $hash->{AttrFn}    = "structure_Attr";
+  addToAttrList("structexclude");
+
+  my %ahash = ( Fn=>"CommandAddStruct",
+                Hlp=>"<structure> <devspec>,add <devspec> to <structure>" );
+  $cmds{addstruct} = \%ahash;
+
+  my %dhash = ( Fn=>"CommandDelStruct",
+                Hlp=>"<structure> <devspec>,delete <devspec> from <structure>");
+  $cmds{delstruct} = \%dhash;
+}
+
+
+#############################
+sub
+structure_Define($$)
+{
+  my ($hash, $def) = @_;
+  my @a = split("[ \t][ \t]*", $def);
+
+  my $u = "wrong syntax: define <name> structure <struct-type> [device ...]";
+  return $u if(int(@a) < 4);
+
+  my $devname = shift(@a);
+  my $modname = shift(@a);
+  my $stype   = shift(@a);
+
+  addToAttrList($stype);
+  $hash->{ATTR} = $stype;
+
+  my %list;
+  foreach my $a (@a) {
+    $list{$a} = 1;
+  }
+  $hash->{CONTENT} = \%list;
+  $hash->{STATE} = join(" ", sort(keys %{$hash->{CONTENT}}));
+
+  @a = ( "set", $devname, $stype, $devname );
+  structure_Attr(@a);
+
+  return undef;
+}
+
+#############################
+sub
+structure_Undef($$)
+{
+  my ($hash, $def) = @_;
+  my @a = ( "del", $hash->{NAME}, $hash->{ATTR} );
+  structure_Attr(@a);
+  return undef;
+}
+
+
+#####################################
+sub
+CommandAddStruct($)
+{
+  my ($cl, $param) = @_;
+  my @a = split(" ", $param);
+
+  if(int(@a) != 2) {
+    return "Usage: addstruct <structure_device> <devspec>";
+  }
+
+  my $name = shift(@a);
+  my $hash = $defs{$name};
+  if(!$hash || $hash->{TYPE} ne "structure") {
+    return "$a is not a structure device";
+  }
+
+  foreach my $d (devspec2array($a[0])) {
+    $hash->{CONTENT}{$d} = 1;
+  }
+  $hash->{STATE} = join(" ", sort(keys %{$hash->{CONTENT}}));
+
+  @a = ( "set", $hash->{NAME}, $hash->{ATTR}, $hash->{NAME} );
+  structure_Attr(@a);
+  return undef;
+}
+
+#####################################
+sub
+CommandDelStruct($)
+{
+  my ($cl, $param) = @_;
+  my @a = split(" ", $param);
+
+  if(int(@a) != 2) {
+    return "Usage: delstruct <structure_device> <devspec>";
+  }
+
+  my $name = shift(@a);
+  my $hash = $defs{$name};
+  if(!$hash || $hash->{TYPE} ne "structure") {
+    return "$a is not a structure device";
+  }
+
+  foreach my $d (devspec2array($a[0])) {
+    delete($hash->{CONTENT}{$d});
+  }
+  $hash->{STATE} = join(" ", sort(keys %{$hash->{CONTENT}}));
+
+  @a = ( "del", $hash->{NAME}, $hash->{ATTR} );
+  structure_Attr(@a);
+  return undef;
+}
+
+
+###################################
+sub
+structure_Set($@)
+{
+  my ($hash, @list) = @_;
+  my $ret = "";
+  $hash->{INSET} = 1;
+  foreach my $d (sort keys %{ $hash->{CONTENT} }) {
+    next if(!$defs{$d});
+    if($defs{$d}{INSET}) {
+      Log 1, "ERROR: endless loop detected for $d in " . $hash->{NAME};
+      next;
+    }
+    next if($attr{$d} && $attr{$d}{structexclude});
+    $list[0] = $d;
+    my $sret .= CommandSet(undef, join(" ", @list));
+    if($sret) {
+      $ret .= "\n" if($ret);
+      $ret .= $sret;
+    }
+  }
+  delete($hash->{INSET});
+  Log 5, "ATTR: $ret" if($ret);
+  return undef;
+}
+
+###################################
+sub
+structure_Attr($@)
+{
+  my ($type, @list) = @_;
+
+  my $hash = $defs{$list[0]};
+  $hash->{INATTR} = 1;
+  my $ret = "";
+  foreach my $d (sort keys %{ $hash->{CONTENT} }) {
+    next if(!$defs{$d});
+    if($defs{$d}{INATTR}) {
+      Log 1, "ERROR: endless loop detected for $d in " . $hash->{NAME};
+      next;
+    }
+    $list[0] = $d;
+    my $sret;
+    if($type eq "del") {
+      $sret .= CommandDeleteAttr(undef, join(" ", @list));
+    } else {
+      $sret .= CommandAttr(undef, join(" ", @list));
+    }
+    if($sret) {
+      $ret .= "\n" if($ret);
+      $ret .= $sret;
+    }
+  }
+  delete($hash->{INATTR});
+  Log 5, "ATTR: $ret" if($ret);
+  return undef;
+}
+
+sub
+addToAttrList($)
+{
+  my $arg = shift;
+
+  my $ua = "";
+  $ua = $attr{global}{userattr} if($attr{global}{userattr});
+  my @al = split(" ", $ua);
+  my %hash;
+  foreach my $a (@al) {
+    $hash{$a} = 1;
+  }
+  $hash{$arg} = 1;
+  $attr{global}{userattr} = join(" ", sort keys %hash);
+}
+
+1;