diff --git a/src/3rd/js/three/xrf/predefinedView.js b/src/3rd/js/three/xrf/predefinedView.js
index 8ec50b4..a625a96 100644
--- a/src/3rd/js/three/xrf/predefinedView.js
+++ b/src/3rd/js/three/xrf/predefinedView.js
@@ -1,6 +1,7 @@
 const updatePredefinedView = (opts) => {
   let {frag,scene} = opts 
 
+  // spec: https://xrfragment.org/#Selection%20of%20interest
   const selectionOfInterest = (frag,scene,mesh) => {
     let id = frag.string
     let oldSelection
@@ -23,6 +24,7 @@ const updatePredefinedView = (opts) => {
     return oldSelection
   }
 
+  // spec: https://xrfragment.org/#predefined_view
   const predefinedView = (frag,scene,mesh) => {
     let id   = frag.string
     if( !id ) return  // prevent empty matches
diff --git a/src/3rd/js/three/xrf/q.js b/src/3rd/js/three/xrf/q.js
index 536053b..9d4c4e3 100644
--- a/src/3rd/js/three/xrf/q.js
+++ b/src/3rd/js/three/xrf/q.js
@@ -1,8 +1,11 @@
+// spec: https://xrfragment.org/#queries
+
 xrf.frag.q = function(v, opts){
   let { frag, mesh, model, camera, scene, renderer, THREE} = opts
   console.log("   └ running query ")
   let qobjs = Object.keys(v.query)
 
+  // spec: https://xrfragment.org/#src
   const instanceScene = () => {
     v.scene = new THREE.Group()
     for ( let i in v.query  ) {
@@ -33,6 +36,7 @@ xrf.frag.q = function(v, opts){
     negative.map( (mesh) => mesh.visible = false )
   }
 
+  // spec: https://xrfragment.org/#queries
   const showHide = () => {
     let q = frag.q.query 
     scene.traverse( (mesh) => {
@@ -48,6 +52,6 @@ xrf.frag.q = function(v, opts){
     })
   }
 
-  if( opts.embedded && opts.embedded.fragment == "src" ) instanceScene()
-  else showHide() // href
+  if( opts.embedded && opts.embedded.fragment == "src" ) instanceScene()  // spec : https://xrfragment.org/#src
+  else showHide() // predefined view                                      // spec : https://xrfragment.org/#queries
 }