diff --git a/Cargo.lock b/Cargo.lock
index 6d714a2..846e161 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3257,7 +3257,7 @@ checksum = "e4a24736216ec316047a1fc4252e27dabb04218aa4a3f37c6e7ddbf1f9782b54"
 
 [[package]]
 name = "nextgraph"
-version = "0.1.0-preview.5"
+version = "0.1.0-preview.6"
 dependencies = [
  "async-once-cell",
  "async-std",
@@ -3311,7 +3311,7 @@ dependencies = [
 
 [[package]]
 name = "ng-broker"
-version = "0.1.0-preview.3"
+version = "0.1.0-preview.6"
 dependencies = [
  "async-std",
  "async-trait",
@@ -3515,7 +3515,7 @@ dependencies = [
 
 [[package]]
 name = "ng-verifier"
-version = "0.1.0-preview.5"
+version = "0.1.0-preview.6"
 dependencies = [
  "async-std",
  "async-trait",
@@ -3538,7 +3538,7 @@ dependencies = [
 
 [[package]]
 name = "ng-wallet"
-version = "0.1.0-preview.5"
+version = "0.1.0-preview.6"
 dependencies = [
  "aes-gcm-siv",
  "argon2",
diff --git a/ng-net/src/app_protocol.rs b/ng-net/src/app_protocol.rs
index 13da847..c8af1cc 100644
--- a/ng-net/src/app_protocol.rs
+++ b/ng-net/src/app_protocol.rs
@@ -59,6 +59,8 @@ pub enum NgAccessV0 {
 pub enum TargetBranchV0 {
     Chat,
     Stream,
+    Comments,
+    BackLinks,
     Context,
     Ontology,
     BranchId(BranchId),
@@ -79,14 +81,13 @@ pub enum NuriTargetV0 {
     Group(String), // shortname of a Group
 
     Repo(RepoId),
-
-    Identity(UserId),
 }
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct NuriV0 {
+    pub identity: Option<UserId>, // None for personal identity
     pub target: NuriTargetV0,
-    pub entire_store: bool, // If it is a store, will (try to) include all the docs belonging to the store
+    pub entire_store: bool, // If it is a store, will include all the docs belonging to the store
 
     pub object: Option<ObjectId>, // used only for FileGet. // cannot be used for queries. only to download an object (file,commit..)
     pub branch: Option<TargetBranchV0>, // if None, the main branch is chosen
@@ -101,6 +102,7 @@ impl NuriV0 {
     pub fn new_repo_target_from_string(repo_id_string: String) -> Result<Self, NgError> {
         let repo_id: RepoId = repo_id_string.as_str().try_into()?;
         Ok(Self {
+            identity: None,
             target: NuriTargetV0::Repo(repo_id),
             entire_store: false,
             object: None,
@@ -114,6 +116,7 @@ impl NuriV0 {
 
     pub fn new_private_store_target() -> Self {
         Self {
+            identity: None,
             target: NuriTargetV0::PrivateStore,
             entire_store: false,
             object: None,
@@ -126,6 +129,7 @@ impl NuriV0 {
     }
     pub fn new_entire_user_site() -> Self {
         Self {
+            identity: None,
             target: NuriTargetV0::UserSite,
             entire_store: false,
             object: None,
@@ -149,6 +153,7 @@ impl NuriV0 {
             let id = decode_id(j)?;
             let key = decode_sym_key(k)?;
             Ok(Self {
+                identity: None,
                 target: NuriTargetV0::PrivateStore,
                 entire_store: false,
                 object: Some(id),
diff --git a/ng-repo/src/types.rs b/ng-repo/src/types.rs
index 1388fd7..912de8d 100644
--- a/ng-repo/src/types.rs
+++ b/ng-repo/src/types.rs
@@ -1344,10 +1344,17 @@ pub enum Branch {
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
 pub enum BranchType {
     Main, // Main is also transactional
-    Chat,
     Store,
     Overlay,
     User,
+    // special transactional branches
+    Chat,
+    Stream,
+    Comments,
+    BackLinks,
+    Context,
+    Ontology,
+
     Transactional, // this could have been called OtherTransactional, but for the sake of simplicity, we use Transactional for any branch that is not the Main one.
     Root,          // only used for BranchInfo
                    //Unknown, // only used temporarily when loading a branch info from commits (Branch commit, then AddBranch commit)
@@ -1360,12 +1367,17 @@ impl fmt::Display for BranchType {
             "{}",
             match self {
                 Self::Main => "Main",
-                Self::Chat => "Chat",
                 Self::Store => "Store",
                 Self::Overlay => "Overlay",
                 Self::User => "User",
                 Self::Transactional => "Transactional",
                 Self::Root => "Root",
+                Self::Chat => "Chat",
+                Self::Stream => "Stream",
+                Self::Comments => "Comments",
+                Self::BackLinks => "BackLinks",
+                Self::Context => "Context",
+                Self::Ontology => "Ontology",
                 //Self::Unknown => "==unknown==",
             }
         )
@@ -1580,7 +1592,7 @@ impl RemovePermission {
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
 pub enum RepoNamedItemV0 {
     Branch(BranchId),
-    Commit(ObjectId),
+    Commit(ObjectRef),
 }
 
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
@@ -1597,7 +1609,7 @@ pub struct AddNameV0 {
     /// the name. in case of conflict, the smallest Id is taken.
     pub name: String,
 
-    /// A branch, commit or file
+    /// A branch or commit
     pub item: RepoNamedItem,
 
     /// Metadata
@@ -1634,7 +1646,7 @@ pub enum RemoveName {
 
 /// Adds a repo into the store branch.
 ///
-/// The repo's `store` field should match the store
+/// The repo's `store` field should match the destination store
 /// DEPS to the previous AddRepo commit(s) if it is an update. in this case, repo_id of the referenced rootbranch definition(s) should match
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
 pub struct AddRepoV0 {