diff --git a/dist/xrfragment.aframe.js b/dist/xrfragment.aframe.js
index 1d2ce49..8edf5e3 100644
--- a/dist/xrfragment.aframe.js
+++ b/dist/xrfragment.aframe.js
@@ -265,7 +265,7 @@ xrfragment_Parser.parse = function(key,value,resultMap) {
 var xrfragment_Query = $hx_exports["xrfragment"]["Query"] = function(str) {
 	this.isNumber = new EReg("^[0-9\\.]+$","");
 	this.isClass = new EReg("^[-]?class$","");
-	this.isAddition = new EReg("^\\+","");
+	this.isRoot = new EReg("^/","");
 	this.isExclude = new EReg("^-","");
 	this.isProp = new EReg("^.*:[><=!]?","");
 	this.q = { };
@@ -329,9 +329,6 @@ xrfragment_Query.prototype = {
 				if(_gthis.isExclude.match(k)) {
 					oper = "!=";
 					k = HxOverrides.substr(k,1,null);
-				} else if(_gthis.isAddition.match(k)) {
-					oper = "+=";
-					k = HxOverrides.substr(k,1,null);
 				} else {
 					v = HxOverrides.substr(v,oper.length,null);
 				}
@@ -353,6 +350,12 @@ xrfragment_Query.prototype = {
 				}
 				return;
 			} else {
+				if(_gthis.isRoot.match(k)) {
+					str = HxOverrides.substr(k,1,null);
+					filter["root"] = true;
+				} else if(filter["root"] == true) {
+					Reflect.deleteField(filter,"root");
+				}
 				filter["id"] = _gthis.isExclude.match(str) ? false : true;
 				var key = _gthis.isExclude.match(str) ? HxOverrides.substr(str,1,null) : str;
 				q[key] = filter;
@@ -1066,7 +1069,7 @@ xrf.frag.href = function(v, opts){
     quat: new THREE.Quaternion()
   }
   // detect equirectangular image
-  let texture = mesh.material.map
+  let texture = mesh.material && mesh.material.map ? mesh.material.map : null
   if( texture && texture.source.data.height == texture.source.data.width/2 ){
     texture.mapping = THREE.ClampToEdgeWrapping
     texture.needsUpdate = true
@@ -1113,7 +1116,7 @@ xrf.frag.href = function(v, opts){
       `,
     });
     mesh.material.needsUpdate = true
-  }else mesh.material = mesh.material.clone()
+  }else if( mesh.material){ mesh.material = mesh.material.clone() }
 
   let click = mesh.userData.XRF.href.exec = (e) => {
     xrf
@@ -1128,8 +1131,10 @@ xrf.frag.href = function(v, opts){
 
   let selected = (state) => () => {
     if( mesh.selected == state ) return // nothing changed 
-    if( mesh.material.uniforms ) mesh.material.uniforms.selected.value = state 
-    else mesh.material.color.r = mesh.material.color.g = mesh.material.color.b = state ? 2.0 : 1.0
+    if( mesh.material ){
+      if( mesh.material.uniforms ) mesh.material.uniforms.selected.value = state 
+      else mesh.material.color.r = mesh.material.color.g = mesh.material.color.b = state ? 2.0 : 1.0
+    }
     // update mouse cursor
     if( !renderer.domElement.lastCursor )
       renderer.domElement.lastCursor = renderer.domElement.style.cursor
@@ -1181,11 +1186,12 @@ const doPredefinedView = (opts) => {
 
   const selectionOfInterest = (frag,scene,mesh) => {
     let id = frag.string
-    // Selection of Interest if predefined_view matches object name
+    if(!id) return id // important: ignore empty strings 
     if( mesh.selection ){
       scene.remove(mesh.selection)
       delete mesh.selection
     }
+    // Selection of Interest if predefined_view matches object name
     if( id == mesh.name || id.substr(1) == mesh.userData.class ){
       xrf.emit('selection',{...opts,frag})
       .then( () => {
@@ -1202,9 +1208,10 @@ const doPredefinedView = (opts) => {
   }
 
   const predefinedView = (frag,scene,mesh) => {
-    let id  = frag.string
-    if( mesh.userData[`#${id}`] ){
-      let frag = xrf.URI.parse( mesh.userData[id], xrf.XRF.NAVIGATOR | xrf.XRF.PV_OVERRIDE | xrf.XRF.EMBEDDED )
+    let id   = frag.string
+    if( !id ) return  // prevent empty matches
+    if( mesh.userData[`#${id}`] ){ // get alias
+      frag = xrf.URI.parse( mesh.userData[`#${id}`], xrf.XRF.NAVIGATOR | xrf.XRF.PV_OVERRIDE | xrf.XRF.EMBEDDED )
       for ( let k in frag ){
         let opts = {frag, model, camera: xrf.camera, scene: xrf.scene, renderer: xrf.renderer, THREE: xrf.THREE }
         xrf.emit('predefinedView',{...opts,frag})
@@ -1271,14 +1278,14 @@ xrf.frag.q = function(v, opts){
           target.mesh.rotation.set(0,0,0)
       }
     }
-    // remove negative selectors
-    let remove = []
+    // hide negative selectors
+    let negative = []
     v.scene.traverse( (mesh) => {
       for ( let i in v.query  ) {
-        if( mesh.name == i && v.query[i].id === false ) remove.push(mesh)
+        if( mesh.name == i && v.query[i].id === false ) negative.push(mesh)
       }
     })
-    remove.map( (mesh) => mesh.parent.remove( mesh ) )
+    negative.map( (mesh) => mesh.visible = false )
   }
 
   const showHide = () => {
@@ -1326,7 +1333,7 @@ xrf.frag.src = function(v, opts){
         xrf.eval.fragment(i, Object.assign(opts,{frag, model,scene}))
       }
       if( frag.q.query ){  
-        let srcScene = frag.q.scene 
+        let srcScene = frag.q.scene // three/xrf/q.js initializes .scene
         if( !srcScene || !srcScene.visible ) return 
         console.log("       └ inserting "+i+" (srcScene)")
         srcScene.position.set(0,0,0)
@@ -1334,6 +1341,7 @@ xrf.frag.src = function(v, opts){
         srcScene.traverse( (m) => {
           if( m.userData && (m.userData.src || m.userData.href) ) return ;//delete m.userData.src // prevent infinite recursion 
           xrf.eval.mesh(m,{scene,recursive:true}) 
+          m.name = mesh.name+"."+m.name // prefix meshname so predefined views don't affect objectnames anymore
         })
         if( srcScene.visible ) src.add( srcScene )
       }
diff --git a/dist/xrfragment.js b/dist/xrfragment.js
index 83c98bc..253f4a6 100644
--- a/dist/xrfragment.js
+++ b/dist/xrfragment.js
@@ -265,7 +265,7 @@ xrfragment_Parser.parse = function(key,value,resultMap) {
 var xrfragment_Query = $hx_exports["xrfragment"]["Query"] = function(str) {
 	this.isNumber = new EReg("^[0-9\\.]+$","");
 	this.isClass = new EReg("^[-]?class$","");
-	this.isAddition = new EReg("^\\+","");
+	this.isRoot = new EReg("^/","");
 	this.isExclude = new EReg("^-","");
 	this.isProp = new EReg("^.*:[><=!]?","");
 	this.q = { };
@@ -329,9 +329,6 @@ xrfragment_Query.prototype = {
 				if(_gthis.isExclude.match(k)) {
 					oper = "!=";
 					k = HxOverrides.substr(k,1,null);
-				} else if(_gthis.isAddition.match(k)) {
-					oper = "+=";
-					k = HxOverrides.substr(k,1,null);
 				} else {
 					v = HxOverrides.substr(v,oper.length,null);
 				}
@@ -353,6 +350,12 @@ xrfragment_Query.prototype = {
 				}
 				return;
 			} else {
+				if(_gthis.isRoot.match(k)) {
+					str = HxOverrides.substr(k,1,null);
+					filter["root"] = true;
+				} else if(filter["root"] == true) {
+					Reflect.deleteField(filter,"root");
+				}
 				filter["id"] = _gthis.isExclude.match(str) ? false : true;
 				var key = _gthis.isExclude.match(str) ? HxOverrides.substr(str,1,null) : str;
 				q[key] = filter;
diff --git a/dist/xrfragment.lua b/dist/xrfragment.lua
index 7d35dba..5af60f0 100644
--- a/dist/xrfragment.lua
+++ b/dist/xrfragment.lua
@@ -1633,7 +1633,7 @@ end
 __xrfragment_Query.super = function(self,str) 
   self.isNumber = EReg.new("^[0-9\\.]+$", "");
   self.isClass = EReg.new("^[-]?class$", "");
-  self.isAddition = EReg.new("^\\+", "");
+  self.isRoot = EReg.new("^/", "");
   self.isExclude = EReg.new("^-", "");
   self.isProp = EReg.new("^.*:[><=!]?", "");
   self.q = _hx_e();
@@ -1852,42 +1852,22 @@ __xrfragment_Query.prototype.parse = function(self,str,recurse)
         end;
         k = __lua_lib_luautf8_Utf8.sub(k, pos + 1, pos + len);
       else
-        if (_gthis.isAddition:match(k)) then 
-          oper = "+=";
-          local pos = 1;
-          local len = nil;
-          if ((len == nil) or (len > (pos + __lua_lib_luautf8_Utf8.len(k)))) then 
-            len = __lua_lib_luautf8_Utf8.len(k);
-          else
-            if (len < 0) then 
-              len = __lua_lib_luautf8_Utf8.len(k) + len;
-            end;
-          end;
-          if (pos < 0) then 
-            pos = __lua_lib_luautf8_Utf8.len(k) + pos;
-          end;
-          if (pos < 0) then 
-            pos = 0;
-          end;
-          k = __lua_lib_luautf8_Utf8.sub(k, pos + 1, pos + len);
+        local pos = __lua_lib_luautf8_Utf8.len(oper);
+        local len = nil;
+        if ((len == nil) or (len > (pos + __lua_lib_luautf8_Utf8.len(v)))) then 
+          len = __lua_lib_luautf8_Utf8.len(v);
         else
-          local pos = __lua_lib_luautf8_Utf8.len(oper);
-          local len = nil;
-          if ((len == nil) or (len > (pos + __lua_lib_luautf8_Utf8.len(v)))) then 
-            len = __lua_lib_luautf8_Utf8.len(v);
-          else
-            if (len < 0) then 
-              len = __lua_lib_luautf8_Utf8.len(v) + len;
-            end;
+          if (len < 0) then 
+            len = __lua_lib_luautf8_Utf8.len(v) + len;
           end;
-          if (pos < 0) then 
-            pos = __lua_lib_luautf8_Utf8.len(v) + pos;
-          end;
-          if (pos < 0) then 
-            pos = 0;
-          end;
-          v = __lua_lib_luautf8_Utf8.sub(v, pos + 1, pos + len);
         end;
+        if (pos < 0) then 
+          pos = __lua_lib_luautf8_Utf8.len(v) + pos;
+        end;
+        if (pos < 0) then 
+          pos = 0;
+        end;
+        v = __lua_lib_luautf8_Utf8.sub(v, pos + 1, pos + len);
       end;
       if (__lua_lib_luautf8_Utf8.len(oper) == 0) then 
         oper = "=";
@@ -1909,6 +1889,29 @@ __xrfragment_Query.prototype.parse = function(self,str,recurse)
       end;
       do return end;
     else
+      if (_gthis.isRoot:match(k)) then 
+        local pos = 1;
+        local len = nil;
+        if ((len == nil) or (len > (pos + __lua_lib_luautf8_Utf8.len(k)))) then 
+          len = __lua_lib_luautf8_Utf8.len(k);
+        else
+          if (len < 0) then 
+            len = __lua_lib_luautf8_Utf8.len(k) + len;
+          end;
+        end;
+        if (pos < 0) then 
+          pos = __lua_lib_luautf8_Utf8.len(k) + pos;
+        end;
+        if (pos < 0) then 
+          pos = 0;
+        end;
+        str = __lua_lib_luautf8_Utf8.sub(k, pos + 1, pos + len);
+        filter.root = true;
+      else
+        if (Reflect.field(filter, "root") == true) then 
+          Reflect.deleteField(filter, "root");
+        end;
+      end;
       local value = (function() 
         local _hx_7
         if (_gthis.isExclude:match(str)) then 
diff --git a/dist/xrfragment.module.js b/dist/xrfragment.module.js
index 0b8a5b4..0d2b1d5 100644
--- a/dist/xrfragment.module.js
+++ b/dist/xrfragment.module.js
@@ -265,7 +265,7 @@ xrfragment_Parser.parse = function(key,value,resultMap) {
 var xrfragment_Query = $hx_exports["xrfragment"]["Query"] = function(str) {
 	this.isNumber = new EReg("^[0-9\\.]+$","");
 	this.isClass = new EReg("^[-]?class$","");
-	this.isAddition = new EReg("^\\+","");
+	this.isRoot = new EReg("^/","");
 	this.isExclude = new EReg("^-","");
 	this.isProp = new EReg("^.*:[><=!]?","");
 	this.q = { };
@@ -329,9 +329,6 @@ xrfragment_Query.prototype = {
 				if(_gthis.isExclude.match(k)) {
 					oper = "!=";
 					k = HxOverrides.substr(k,1,null);
-				} else if(_gthis.isAddition.match(k)) {
-					oper = "+=";
-					k = HxOverrides.substr(k,1,null);
 				} else {
 					v = HxOverrides.substr(v,oper.length,null);
 				}
@@ -353,6 +350,12 @@ xrfragment_Query.prototype = {
 				}
 				return;
 			} else {
+				if(_gthis.isRoot.match(k)) {
+					str = HxOverrides.substr(k,1,null);
+					filter["root"] = true;
+				} else if(filter["root"] == true) {
+					Reflect.deleteField(filter,"root");
+				}
 				filter["id"] = _gthis.isExclude.match(str) ? false : true;
 				var key = _gthis.isExclude.match(str) ? HxOverrides.substr(str,1,null) : str;
 				q[key] = filter;
diff --git a/dist/xrfragment.py b/dist/xrfragment.py
index b86afdf..2c7b6a4 100644
--- a/dist/xrfragment.py
+++ b/dist/xrfragment.py
@@ -1338,14 +1338,14 @@ class xrfragment_Parser:
 
 class xrfragment_Query:
     _hx_class_name = "xrfragment.Query"
-    __slots__ = ("str", "q", "isProp", "isExclude", "isAddition", "isClass", "isNumber")
-    _hx_fields = ["str", "q", "isProp", "isExclude", "isAddition", "isClass", "isNumber"]
+    __slots__ = ("str", "q", "isProp", "isExclude", "isRoot", "isClass", "isNumber")
+    _hx_fields = ["str", "q", "isProp", "isExclude", "isRoot", "isClass", "isNumber"]
     _hx_methods = ["toObject", "expandAliases", "get", "parse", "test", "testProperty"]
 
     def __init__(self,_hx_str):
         self.isNumber = EReg("^[0-9\\.]+$","")
         self.isClass = EReg("^[-]?class$","")
-        self.isAddition = EReg("^\\+","")
+        self.isRoot = EReg("^/","")
         self.isExclude = EReg("^-","")
         self.isProp = EReg("^.*:[><=!]?","")
         self.q = _hx_AnonObject({})
@@ -1409,13 +1409,7 @@ class xrfragment_Query:
                     oper = "!="
                     k = HxString.substr(k,1,None)
                 else:
-                    _this = _gthis.isAddition
-                    _this.matchObj = python_lib_Re.search(_this.pattern,k)
-                    if (_this.matchObj is not None):
-                        oper = "+="
-                        k = HxString.substr(k,1,None)
-                    else:
-                        v = HxString.substr(v,len(oper),None)
+                    v = HxString.substr(v,len(oper),None)
                 if (len(oper) == 0):
                     oper = "="
                 _this = _gthis.isClass
@@ -1438,6 +1432,13 @@ class xrfragment_Query:
                     setattr(q,(("_hx_" + k) if ((k in python_Boot.keywords)) else (("_hx_" + k) if (((((len(k) > 2) and ((ord(k[0]) == 95))) and ((ord(k[1]) == 95))) and ((ord(k[(len(k) - 1)]) != 95)))) else k)),_hx_filter)
                 return
             else:
+                _this = _gthis.isRoot
+                _this.matchObj = python_lib_Re.search(_this.pattern,k)
+                if (_this.matchObj is not None):
+                    _hx_str = HxString.substr(k,1,None)
+                    setattr(_hx_filter,(("_hx_" + "root") if (("root" in python_Boot.keywords)) else (("_hx_" + "root") if (((((len("root") > 2) and ((ord("root"[0]) == 95))) and ((ord("root"[1]) == 95))) and ((ord("root"[(len("root") - 1)]) != 95)))) else "root")),True)
+                elif (Reflect.field(_hx_filter,"root") == True):
+                    Reflect.deleteField(_hx_filter,"root")
                 _this = _gthis.isExclude
                 _this.matchObj = python_lib_Re.search(_this.pattern,_hx_str)
                 value = (False if ((_this.matchObj is not None)) else True)
diff --git a/dist/xrfragment.three.js b/dist/xrfragment.three.js
index 98957da..befe22d 100644
--- a/dist/xrfragment.three.js
+++ b/dist/xrfragment.three.js
@@ -265,7 +265,7 @@ xrfragment_Parser.parse = function(key,value,resultMap) {
 var xrfragment_Query = $hx_exports["xrfragment"]["Query"] = function(str) {
 	this.isNumber = new EReg("^[0-9\\.]+$","");
 	this.isClass = new EReg("^[-]?class$","");
-	this.isAddition = new EReg("^\\+","");
+	this.isRoot = new EReg("^/","");
 	this.isExclude = new EReg("^-","");
 	this.isProp = new EReg("^.*:[><=!]?","");
 	this.q = { };
@@ -329,9 +329,6 @@ xrfragment_Query.prototype = {
 				if(_gthis.isExclude.match(k)) {
 					oper = "!=";
 					k = HxOverrides.substr(k,1,null);
-				} else if(_gthis.isAddition.match(k)) {
-					oper = "+=";
-					k = HxOverrides.substr(k,1,null);
 				} else {
 					v = HxOverrides.substr(v,oper.length,null);
 				}
@@ -353,6 +350,12 @@ xrfragment_Query.prototype = {
 				}
 				return;
 			} else {
+				if(_gthis.isRoot.match(k)) {
+					str = HxOverrides.substr(k,1,null);
+					filter["root"] = true;
+				} else if(filter["root"] == true) {
+					Reflect.deleteField(filter,"root");
+				}
 				filter["id"] = _gthis.isExclude.match(str) ? false : true;
 				var key = _gthis.isExclude.match(str) ? HxOverrides.substr(str,1,null) : str;
 				q[key] = filter;
@@ -1066,7 +1069,7 @@ xrf.frag.href = function(v, opts){
     quat: new THREE.Quaternion()
   }
   // detect equirectangular image
-  let texture = mesh.material.map
+  let texture = mesh.material && mesh.material.map ? mesh.material.map : null
   if( texture && texture.source.data.height == texture.source.data.width/2 ){
     texture.mapping = THREE.ClampToEdgeWrapping
     texture.needsUpdate = true
@@ -1113,7 +1116,7 @@ xrf.frag.href = function(v, opts){
       `,
     });
     mesh.material.needsUpdate = true
-  }else mesh.material = mesh.material.clone()
+  }else if( mesh.material){ mesh.material = mesh.material.clone() }
 
   let click = mesh.userData.XRF.href.exec = (e) => {
     xrf
@@ -1128,8 +1131,10 @@ xrf.frag.href = function(v, opts){
 
   let selected = (state) => () => {
     if( mesh.selected == state ) return // nothing changed 
-    if( mesh.material.uniforms ) mesh.material.uniforms.selected.value = state 
-    else mesh.material.color.r = mesh.material.color.g = mesh.material.color.b = state ? 2.0 : 1.0
+    if( mesh.material ){
+      if( mesh.material.uniforms ) mesh.material.uniforms.selected.value = state 
+      else mesh.material.color.r = mesh.material.color.g = mesh.material.color.b = state ? 2.0 : 1.0
+    }
     // update mouse cursor
     if( !renderer.domElement.lastCursor )
       renderer.domElement.lastCursor = renderer.domElement.style.cursor
@@ -1181,11 +1186,12 @@ const doPredefinedView = (opts) => {
 
   const selectionOfInterest = (frag,scene,mesh) => {
     let id = frag.string
-    // Selection of Interest if predefined_view matches object name
+    if(!id) return id // important: ignore empty strings 
     if( mesh.selection ){
       scene.remove(mesh.selection)
       delete mesh.selection
     }
+    // Selection of Interest if predefined_view matches object name
     if( id == mesh.name || id.substr(1) == mesh.userData.class ){
       xrf.emit('selection',{...opts,frag})
       .then( () => {
@@ -1202,9 +1208,10 @@ const doPredefinedView = (opts) => {
   }
 
   const predefinedView = (frag,scene,mesh) => {
-    let id  = frag.string
-    if( mesh.userData[`#${id}`] ){
-      let frag = xrf.URI.parse( mesh.userData[id], xrf.XRF.NAVIGATOR | xrf.XRF.PV_OVERRIDE | xrf.XRF.EMBEDDED )
+    let id   = frag.string
+    if( !id ) return  // prevent empty matches
+    if( mesh.userData[`#${id}`] ){ // get alias
+      frag = xrf.URI.parse( mesh.userData[`#${id}`], xrf.XRF.NAVIGATOR | xrf.XRF.PV_OVERRIDE | xrf.XRF.EMBEDDED )
       for ( let k in frag ){
         let opts = {frag, model, camera: xrf.camera, scene: xrf.scene, renderer: xrf.renderer, THREE: xrf.THREE }
         xrf.emit('predefinedView',{...opts,frag})
@@ -1271,14 +1278,14 @@ xrf.frag.q = function(v, opts){
           target.mesh.rotation.set(0,0,0)
       }
     }
-    // remove negative selectors
-    let remove = []
+    // hide negative selectors
+    let negative = []
     v.scene.traverse( (mesh) => {
       for ( let i in v.query  ) {
-        if( mesh.name == i && v.query[i].id === false ) remove.push(mesh)
+        if( mesh.name == i && v.query[i].id === false ) negative.push(mesh)
       }
     })
-    remove.map( (mesh) => mesh.parent.remove( mesh ) )
+    negative.map( (mesh) => mesh.visible = false )
   }
 
   const showHide = () => {
@@ -1326,7 +1333,7 @@ xrf.frag.src = function(v, opts){
         xrf.eval.fragment(i, Object.assign(opts,{frag, model,scene}))
       }
       if( frag.q.query ){  
-        let srcScene = frag.q.scene 
+        let srcScene = frag.q.scene // three/xrf/q.js initializes .scene
         if( !srcScene || !srcScene.visible ) return 
         console.log("       └ inserting "+i+" (srcScene)")
         srcScene.position.set(0,0,0)
@@ -1334,6 +1341,7 @@ xrf.frag.src = function(v, opts){
         srcScene.traverse( (m) => {
           if( m.userData && (m.userData.src || m.userData.href) ) return ;//delete m.userData.src // prevent infinite recursion 
           xrf.eval.mesh(m,{scene,recursive:true}) 
+          m.name = mesh.name+"."+m.name // prefix meshname so predefined views don't affect objectnames anymore
         })
         if( srcScene.visible ) src.add( srcScene )
       }
diff --git a/dist/xrfragment.three.module.js b/dist/xrfragment.three.module.js
index fb9fd75..55d3d3e 100644
--- a/dist/xrfragment.three.module.js
+++ b/dist/xrfragment.three.module.js
@@ -265,7 +265,7 @@ xrfragment_Parser.parse = function(key,value,resultMap) {
 var xrfragment_Query = $hx_exports["xrfragment"]["Query"] = function(str) {
 	this.isNumber = new EReg("^[0-9\\.]+$","");
 	this.isClass = new EReg("^[-]?class$","");
-	this.isAddition = new EReg("^\\+","");
+	this.isRoot = new EReg("^/","");
 	this.isExclude = new EReg("^-","");
 	this.isProp = new EReg("^.*:[><=!]?","");
 	this.q = { };
@@ -329,9 +329,6 @@ xrfragment_Query.prototype = {
 				if(_gthis.isExclude.match(k)) {
 					oper = "!=";
 					k = HxOverrides.substr(k,1,null);
-				} else if(_gthis.isAddition.match(k)) {
-					oper = "+=";
-					k = HxOverrides.substr(k,1,null);
 				} else {
 					v = HxOverrides.substr(v,oper.length,null);
 				}
@@ -353,6 +350,12 @@ xrfragment_Query.prototype = {
 				}
 				return;
 			} else {
+				if(_gthis.isRoot.match(k)) {
+					str = HxOverrides.substr(k,1,null);
+					filter["root"] = true;
+				} else if(filter["root"] == true) {
+					Reflect.deleteField(filter,"root");
+				}
 				filter["id"] = _gthis.isExclude.match(str) ? false : true;
 				var key = _gthis.isExclude.match(str) ? HxOverrides.substr(str,1,null) : str;
 				q[key] = filter;
@@ -1066,7 +1069,7 @@ xrf.frag.href = function(v, opts){
     quat: new THREE.Quaternion()
   }
   // detect equirectangular image
-  let texture = mesh.material.map
+  let texture = mesh.material && mesh.material.map ? mesh.material.map : null
   if( texture && texture.source.data.height == texture.source.data.width/2 ){
     texture.mapping = THREE.ClampToEdgeWrapping
     texture.needsUpdate = true
@@ -1113,7 +1116,7 @@ xrf.frag.href = function(v, opts){
       `,
     });
     mesh.material.needsUpdate = true
-  }else mesh.material = mesh.material.clone()
+  }else if( mesh.material){ mesh.material = mesh.material.clone() }
 
   let click = mesh.userData.XRF.href.exec = (e) => {
     xrf
@@ -1128,8 +1131,10 @@ xrf.frag.href = function(v, opts){
 
   let selected = (state) => () => {
     if( mesh.selected == state ) return // nothing changed 
-    if( mesh.material.uniforms ) mesh.material.uniforms.selected.value = state 
-    else mesh.material.color.r = mesh.material.color.g = mesh.material.color.b = state ? 2.0 : 1.0
+    if( mesh.material ){
+      if( mesh.material.uniforms ) mesh.material.uniforms.selected.value = state 
+      else mesh.material.color.r = mesh.material.color.g = mesh.material.color.b = state ? 2.0 : 1.0
+    }
     // update mouse cursor
     if( !renderer.domElement.lastCursor )
       renderer.domElement.lastCursor = renderer.domElement.style.cursor
@@ -1181,11 +1186,12 @@ const doPredefinedView = (opts) => {
 
   const selectionOfInterest = (frag,scene,mesh) => {
     let id = frag.string
-    // Selection of Interest if predefined_view matches object name
+    if(!id) return id // important: ignore empty strings 
     if( mesh.selection ){
       scene.remove(mesh.selection)
       delete mesh.selection
     }
+    // Selection of Interest if predefined_view matches object name
     if( id == mesh.name || id.substr(1) == mesh.userData.class ){
       xrf.emit('selection',{...opts,frag})
       .then( () => {
@@ -1202,9 +1208,10 @@ const doPredefinedView = (opts) => {
   }
 
   const predefinedView = (frag,scene,mesh) => {
-    let id  = frag.string
-    if( mesh.userData[`#${id}`] ){
-      let frag = xrf.URI.parse( mesh.userData[id], xrf.XRF.NAVIGATOR | xrf.XRF.PV_OVERRIDE | xrf.XRF.EMBEDDED )
+    let id   = frag.string
+    if( !id ) return  // prevent empty matches
+    if( mesh.userData[`#${id}`] ){ // get alias
+      frag = xrf.URI.parse( mesh.userData[`#${id}`], xrf.XRF.NAVIGATOR | xrf.XRF.PV_OVERRIDE | xrf.XRF.EMBEDDED )
       for ( let k in frag ){
         let opts = {frag, model, camera: xrf.camera, scene: xrf.scene, renderer: xrf.renderer, THREE: xrf.THREE }
         xrf.emit('predefinedView',{...opts,frag})
@@ -1271,14 +1278,14 @@ xrf.frag.q = function(v, opts){
           target.mesh.rotation.set(0,0,0)
       }
     }
-    // remove negative selectors
-    let remove = []
+    // hide negative selectors
+    let negative = []
     v.scene.traverse( (mesh) => {
       for ( let i in v.query  ) {
-        if( mesh.name == i && v.query[i].id === false ) remove.push(mesh)
+        if( mesh.name == i && v.query[i].id === false ) negative.push(mesh)
       }
     })
-    remove.map( (mesh) => mesh.parent.remove( mesh ) )
+    negative.map( (mesh) => mesh.visible = false )
   }
 
   const showHide = () => {
@@ -1326,7 +1333,7 @@ xrf.frag.src = function(v, opts){
         xrf.eval.fragment(i, Object.assign(opts,{frag, model,scene}))
       }
       if( frag.q.query ){  
-        let srcScene = frag.q.scene 
+        let srcScene = frag.q.scene // three/xrf/q.js initializes .scene
         if( !srcScene || !srcScene.visible ) return 
         console.log("       └ inserting "+i+" (srcScene)")
         srcScene.position.set(0,0,0)
@@ -1334,6 +1341,7 @@ xrf.frag.src = function(v, opts){
         srcScene.traverse( (m) => {
           if( m.userData && (m.userData.src || m.userData.href) ) return ;//delete m.userData.src // prevent infinite recursion 
           xrf.eval.mesh(m,{scene,recursive:true}) 
+          m.name = mesh.name+"."+m.name // prefix meshname so predefined views don't affect objectnames anymore
         })
         if( srcScene.visible ) src.add( srcScene )
       }
diff --git a/src/Test.hx b/src/Test.hx
index 0c6b299..8861bbe 100644
--- a/src/Test.hx
+++ b/src/Test.hx
@@ -16,7 +16,8 @@ class Test {
 
   static public function main():Void {
     test( Spec.load("src/spec/url.json") );
-    test( Spec.load("src/spec/query.class.json") );
+    test( Spec.load("src/spec/query.selectors.json") );
+    test( Spec.load("src/spec/query.root.json") );
     test( Spec.load("src/spec/query.rules.json") );
     //test( Spec.load("src/spec/tmp.json") );
 		if( errors > 1 ) trace("\n-----\n[ ❌] "+errors+" errors :/");
@@ -43,6 +44,10 @@ class Test {
       if( item.expect.fn == "equal.xy"            ) valid = equalXY(res,item);
       if( item.expect.fn == "equal.xyz"           ) valid = equalXYZ(res,item);
       if( item.expect.fn == "equal.multi"         ) valid = equalMulti(res, item);
+      if( item.expect.fn == "testQueryRoot"       ){
+        if( !item.expect.out ) valid = !q.get()[ item.expect.input[0] ].root;
+        else valid = item.expect.out == q.get()[ item.expect.input[0] ].root;
+      }
       var ok:String = valid ? "[ ✔ ] " : "[ ❌] ";
       trace( ok + item.fn + ": '" + item.data + "'" + (item.label ? "    (" + (item.label?item.label:item.expect.fn) +")" : ""));
 			if( !valid ) errors += 1;
diff --git a/src/spec/query.root.json b/src/spec/query.root.json
new file mode 100644
index 0000000..0d4f101
--- /dev/null
+++ b/src/spec/query.root.json
@@ -0,0 +1,2 @@
+[
+]
diff --git a/src/spec/query.class.json b/src/spec/query.selectors.json
similarity index 80%
rename from src/spec/query.class.json
rename to src/spec/query.selectors.json
index 5cf9b38..15bfe77 100644
--- a/src/spec/query.class.json
+++ b/src/spec/query.selectors.json
@@ -10,5 +10,7 @@
   {"fn":"query","data":".foo -.foo bar:>5 .foo", "expect":{ "fn":"testProperty","input":["class","foo"],"out":true},"label":"class:foo"},
   {"fn":"query","data":".foo -.foo .foo", "expect":{ "fn":"testProperty","input":["class","foo"],"out":true},"label":"class:foo"},
   {"fn":"query","data":".foo -.foo .foo", "expect":{ "fn":"testProperty","input":["id","foo"],"out":false},"label":"!id:foo"},
-  {"fn":"query","data":"foo -foo foo", "expect":{ "fn":"testProperty","input":["id","foo"],"out":true},"label":"id:foo?"}
+  {"fn":"query","data":"foo -foo foo", "expect":{ "fn":"testProperty","input":["id","foo"],"out":true},"label":"id:foo?"},
+  {"fn":"query","data":"/foo",         "expect":{ "fn":"testQueryRoot","input":["foo"],"out":true},"label":"foo should be root-only"},
+  {"fn":"query","data":"/foo foo",         "expect":{ "fn":"testQueryRoot","input":["foo"],"out":false},"label":"foo should recursively selected"}
 ]
diff --git a/src/xrfragment/Query.hx b/src/xrfragment/Query.hx
index d75736b..c995be7 100644
--- a/src/xrfragment/Query.hx
+++ b/src/xrfragment/Query.hx
@@ -44,7 +44,7 @@ class Query {
   private var q:haxe.DynamicAccess<Dynamic> = {};
   private var isProp:EReg        = ~/^.*:[><=!]?/;
   private var isExclude:EReg     = ~/^-/;
-  private var isAddition:EReg    = ~/^\+/;
+  private var isRoot:EReg        = ~/^\//;
   private var isClass:EReg       = ~/^[-]?class$/;
   private var isNumber:EReg      = ~/^[0-9\.]+$/;
 
@@ -89,13 +89,9 @@ class Query {
         if( str.indexOf("<=") != -1 ) oper = "<=";
         if( isExclude.match(k) ){
           oper = "!=";
-          k = k.substr(1); // convert "-foo" into "foo" 
-        }else if( isAddition.match(k) ){
-          oper = "+=";
-          k = k.substr(1); // convert "+foo" into "foo" 
+          k = k.substr(1);      // convert "-foo" into "foo" 
         }else v = v.substr(oper.length); // change ">=foo" into "foo" (strip operator)
         if( oper.length == 0 ) oper = "=";
-
         if( isClass.match(k) ){
           filter[ prefix+ k ] = oper != "!=";
           q.set(v,filter);
@@ -108,6 +104,10 @@ class Query {
         }
         return;
       }else{ // id
+        if( isRoot.match(k) ){
+          str = k.substr(1);                                        // convert "/foo" to "foo"
+          filter[ "root" ] = true;
+        }else if( filter[ "root" ] == true ) filter.remove("root"); // undo root-only
         filter[ "id" ] = isExclude.match(str) ? false: true;
         q.set( (isExclude.match(str) ? str.substr(1) : str ) ,filter );
       }