diff --git a/lib/index.js b/lib/index.js
index 8ababc8..b6cea27 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -331,7 +331,9 @@ function initDB(peer, config) {
   }
 
   /**
-   * @param {Rec} rec
+   * Public the identity ID from the given record.
+   *
+   * @param {Pick<RecPresent, 'msg' | 'hash'>} rec
    * @returns {string | null}
    */
   function getIdentityId(rec) {
@@ -349,6 +351,10 @@ function initDB(peer, config) {
   }
 
   /**
+   * Find the identity that contains this `keypair` (or the implicit
+   * config.keypair) under the given `domain`.
+   *
+   * @public
    * @param {{
    *   keypair?: KeypairPublicSlice;
    *   domain: string;
@@ -386,10 +392,14 @@ function initDB(peer, config) {
   }
 
   /**
+   * Does this `identity` have this `keypair` (or the implicit config.keypair)?
+   *
+   * @public
    * @param {{
    *   keypair?: KeypairPublicSlice;
    *   identity: string;
    * }} opts
+   * @returns {boolean}
    */
   function identityHas(opts) {
     const keypair = opts?.keypair ?? config.keypair
@@ -410,6 +420,10 @@ function initDB(peer, config) {
   }
 
   /**
+   * Create an identity (root msg) for the given `keypair` (or the implicit
+   * config.keypair) under this `domain`.
+   *
+   * @public
    * @param {{
    *   keypair?: Keypair,
    *   domain: string,
@@ -441,6 +455,10 @@ function initDB(peer, config) {
   }
 
   /**
+   * Find or create an identity (root msg) for the given `keypair` (or the
+   * implicit config.keypair) under this `domain`.
+   *
+   * @public
    * @param {{
    *   keypair?: Keypair,
    *   domain: string,
@@ -461,6 +479,10 @@ function initDB(peer, config) {
   }
 
   /**
+   * Create a consent signature for the given `keypair` (or the implicit
+   * config.keypair) to be added to the given `identity`.
+   *
+   * @public
    * @param {{
    *   keypair?: KeypairPrivateSlice;
    *   identity: string;
diff --git a/protospec.md b/protospec.md
index 9a767f1..4847a2c 100644
--- a/protospec.md
+++ b/protospec.md
@@ -34,7 +34,7 @@ interface Msg {
       }
     }
     domain: string // alphanumeric string, at least 3 chars, max 100 chars
-    v: 2 // hard-coded at 2, indicates the version of the feed format
+    v: 3 // hard-coded at 3, indicates the version of the feed format
   }
   pubkey: Pubkey // base58 encoded string for the author's public key
   sig: Signature // Signs the `metadata` object
@@ -60,7 +60,7 @@ interface Msg {
       }
     }
     domain: string // alphanumeric string, at least 3 chars, max 100 chars
-    v: 2
+    v: 3
   }
   pubkey: Pubkey
   sig: Signature
@@ -86,11 +86,6 @@ type Key =
       algorithm: 'ed25519' // libsodium crypto_sign_detached
       bytes: string // base58 encoded string for the public key being added
     }
-  | {
-      purpose: 'subidentity'
-      algorithm: 'tangle' // PPPPP tangle
-      bytes: string // subidentity ID
-    }
   | {
       // WIP!!
       purpose: 'box' // asymmetric encryption