diff --git a/README.md b/README.md
index 9898baf..39b7c6b 100644
--- a/README.md
+++ b/README.md
@@ -50,13 +50,13 @@ const userSchema = Compactr.schema({
 userSchema.write({ id: 123, name: 'John' });
 
 // Get the header bytes
-const header = userSchema.headerBytes();
+const header = userSchema.headerBuffer();
 
 // Get the content bytes 
-const partial = userSchema.contentBytes();
+const partial = userSchema.contentBuffer();
 
 // Get the full payload (header + content bytes)
-const buffer = userSchema.bytes();
+const buffer = userSchema.buffer();
 
 
 
@@ -90,7 +90,30 @@ Compactr (partial): `<Buffer 7b 4a 6f 68 6e>`: 5 bytes
 
 ## Protocol details
 
-[Compactr Protocol](https://github.com/compactr/protocol)
+### Data types
+
+Type | Count bytes | Byte size
+--- | --- | ---
+boolean | 0 | 1
+number | 0 | 8
+int8 | 0 | 1
+int16 | 0 | 2
+int32 | 0 | 4
+double | 0 | 8
+string | 1 | 2/char
+char8 | 1 | 1/char
+char16 | 1 | 2/char
+char32 | 1 | 4/char 
+array | 1 | (x)/entry
+object | 1 | (x)
+unsigned | 0 | 8
+unsigned8 | 0 | 1 
+unsigned16 | 0 | 2
+unsigned32 | 0 | 4
+
+* Count bytes range can be specified per-item in the schema*
+
+See the full [Compactr protocol](https://github.com/compactr/protocol)
 
 
 ## Want to help ?
diff --git a/package.json b/package.json
index 39f3762..1a95533 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "compactr",
-  "version": "2.2.0",
+  "version": "2.2.1",
   "description": "Schema based serialization made easy",
   "main": "index.js",
   "scripts": {
diff --git a/src/converter.js b/src/converter.js
index 9a7e771..c0777fa 100644
--- a/src/converter.js
+++ b/src/converter.js
@@ -4,35 +4,43 @@
 
 /* Methods -------------------------------------------------------------------*/
 
+/** @private */
 function int8(value) {
   return Number(value) & 0xff;
 }
 
+/** @private */
 function int16(value) {
   return Number(value) & 0xffff;
 }
 
+/** @private */
 function int32(value) {
   return Number(value) & 0xffffffff;
 }
 
+/** @private */
 function double(value) {
   const ret = Number(value);
   return (Number.isFinite(ret)) ? ret : 0;
 }
 
+/** @private */
 function string(value) {
   return '' + value;
 }
 
+/** @private */
 function boolean(value) {
   return !!value;
 }
 
+/** @private */
 function object(value) {
   return (value.constructor === Object) ? value : {};
 }
 
+/** @private */
 function array(value) {
   return (value.concat !== undefined) ? value : [value];
 }
diff --git a/src/decoder.js b/src/decoder.js
index 05e0d5a..e8fe39a 100644
--- a/src/decoder.js
+++ b/src/decoder.js
@@ -9,10 +9,12 @@ const fromChar = String.fromCharCode;
 
 /* Methods -------------------------------------------------------------------*/
 
+/** @private */
 function boolean(bytes) {
   return !!bytes[0];
 }
 
+/** @private */
 function number(bytes) {
   if (bytes.length === 1) return (!(bytes[0] & 0x80))?bytes[0]:((0xff - bytes[0] + 1) * -1);
   if (bytes.length === 2) {
@@ -22,12 +24,14 @@ function number(bytes) {
   return (bytes[0] << 24) | (bytes[1] << 16) | (bytes[2] << 8) | (bytes[3]);
 }
 
+/** @private */
 function unsigned(bytes) {
   if (bytes.length === 1) return bytes[0];
   if (bytes.length === 2) return bytes[0] << 8 | bytes[1];
   return (bytes[0] << 24) | (bytes[1] << 16) | (bytes[2] << 8) | (bytes[3]);
 }
 
+/** @private */
 function string(bytes) {
   let res = [];
   for (let i = 0; i < bytes.length; i += 2) {
@@ -36,6 +40,7 @@ function string(bytes) {
   return fromChar.apply(null, res);
 }
 
+/** @private */
 function char8(bytes) {
   let res = [];
   for (let i = 0; i < bytes.length; i += 1) {
@@ -44,6 +49,7 @@ function char8(bytes) {
   return fromChar.apply(null, res);
 }
 
+/** @private */
 function char32(bytes) {
   let res = [];
   for (let i = 0; i < bytes.length; i += 4) {
@@ -52,6 +58,7 @@ function char32(bytes) {
   return fromChar.apply(null, res);
 }
 
+/** @private */
 function array(schema, bytes) {
   const ret = [];
   for (let i = 0; i < bytes.length;) {
@@ -64,11 +71,15 @@ function array(schema, bytes) {
   return ret;
 }
 
+/** @private */
 function object(schema, bytes) {
   return schema.read(bytes);
 }
 
-/** Credit to @feross' ieee754 module */
+/**
+ * Credit to @feross' ieee754 module
+ * @private
+ */
 function double(bytes) {
   let s = bytes[0];
   let e = (s & 127);
diff --git a/src/encoder.js b/src/encoder.js
index 073e21e..42a511e 100644
--- a/src/encoder.js
+++ b/src/encoder.js
@@ -17,28 +17,44 @@ const fastPush = Array.prototype.push;
 
 /* Methods -------------------------------------------------------------------*/
 
+/** @private */
 function boolean(val) {
   return [val ? 1 : 0];
 }
 
+/** @private */
 function int8(val) {
   return [(val < 0) ? 256 + val : val];
 }
 
+/** @private */
 function int16(val) {
   if (val < 0) val = 0xffff + val + 1;
   return [val >> 8, val & 0xff];
 }
 
+/** @private */
 function int32(val) {
   if (val < 0) val = 0xffffffff + val + 1;
   return [val >> 24, val >> 16, val >> 8, val & 0xff];
 }
 
-function unsigned8(val) { return [val & 0xff]; }
-function unsigned16(val) { return [val >> 8, val & 0xff]; }
-function unsigned32(val) { return [val >> 24, val >> 16, val >> 8, val & 0xff]; }
+/** @private */
+function unsigned8(val) {
+  return [val & 0xff];
+}
+
+/** @private */
+function unsigned16(val) {
+  return [val >> 8, val & 0xff];
+}
+
+/** @private */
+function unsigned32(val) {
+  return [val >> 24, val >> 16, val >> 8, val & 0xff];
+}
 
+/** @private */
 function string(encoding, val) {
   const chars = [];
   for (let i = 0; i < val.length; i++) {
@@ -48,6 +64,7 @@ function string(encoding, val) {
   return chars;
 }
 
+/** @private */
 function array(schema, val) {
   const ret = [];
   for (let i = 0; i < val.length; i++) {
@@ -58,11 +75,15 @@ function array(schema, val) {
   return ret;
 }
 
+/** @private */
 function object(schema, val) {
   return schema.write(val).buffer();
 }
 
-/** Credit to @feross' ieee754 module */
+/** 
+ * Credit to @feross' ieee754 module 
+ * @private
+ */
 function double(val) {
   var buffer = [];
   var e, m, c;
@@ -120,6 +141,7 @@ function double(val) {
   return buffer;
 }
 
+/** @private */
 function getSize(count, byteLength) {
   return intMap[count](byteLength);
 }
diff --git a/src/reader.js b/src/reader.js
index 2d59761..258efdd 100644
--- a/src/reader.js
+++ b/src/reader.js
@@ -10,11 +10,20 @@ const Decoder = require('./decoder');
 
 function Reader(scope) {
 
+  /**
+   * Decodes an encoded buffer. Requires header bytes.
+   * @param {Buffer} bytes
+   * @returns {Object} The decoded buffer
+   */
   function read(bytes) {
     readHeader(bytes);
     return readContent(bytes, scope.contentBegins);
   }
 
+  /**
+   * Reads only the header of an encoded buffer
+   * @param {*} bytes 
+   */
   function readHeader(bytes) {
     scope.header = [];
     let caret = 1;
@@ -27,6 +36,7 @@ function Reader(scope) {
     return this;
   }
 
+  /** @private */
   function readKey(bytes, caret, index) {
     const key = getSchemaDef(bytes[caret]);
 
@@ -37,12 +47,19 @@ function Reader(scope) {
     return caret + key.count + 1;
   }
 
+  /** @private */
   function getSchemaDef(index) {
     for (let i = 0; i < scope.items.length; i++) {
       if (scope.indices[scope.items[i]].index === index) return scope.indices[scope.items[i]];
     }
   }
 
+  /**
+   * Reads only a content buffer and returns an object with the decoded values 
+   * @param {Buffer} bytes The content buffer 
+   * @param {Integer} caret The content bytes offset, if the bytes also include an header
+   * @returns {Object} An object with the decoded values
+   */
   function readContent(bytes, caret) {
     caret = caret || 0;
     const ret = {};
diff --git a/src/schema.js b/src/schema.js
index c960448..1fa74a8 100644
--- a/src/schema.js
+++ b/src/schema.js
@@ -12,6 +12,11 @@ const Converter = require('./converter');
 
 /* Methods -------------------------------------------------------------------*/
 
+/**
+ * Creates a new schema definition, with a reader and writer attached
+ * @param {*} schema The schema to use
+ * @param {Object (keyOrder: {boolean})} options The options for the schema
+ */
 function Schema(schema, options = { keyOrder: false }) {
   const sizeRef = {
     boolean: 1,
@@ -48,6 +53,7 @@ function Schema(schema, options = { keyOrder: false }) {
 
   applyBlank(); // Pre-load header for easy streaming
 
+  /** @private */
   function preformat(schema) {
     const ret = {};
     Object.keys(schema)
@@ -74,6 +80,7 @@ function Schema(schema, options = { keyOrder: false }) {
     return ret;
   }
 
+  /** @private */
   function applyBlank() {
     for (let key in scope.schema) {
       scope.header.push({
@@ -83,6 +90,7 @@ function Schema(schema, options = { keyOrder: false }) {
     }
   }
 
+  /** @private */
   function computeNested(schema, key) {
     const keyType = schema[key].type;
     const isObject = (keyType === 'object');
diff --git a/src/writer.js b/src/writer.js
index 54a8b8d..d35717c 100644
--- a/src/writer.js
+++ b/src/writer.js
@@ -10,6 +10,12 @@ const fastPush = Array.prototype.push;
 
 function Writer(scope) {
 
+  /**
+   * Start writing some data against a schema
+   * @param {*} data The data to be encoded
+   * @param {Object (coerce: {boolean}, validate: {boolean})} options The options for the encoding
+   * @returns {Writer} Self reference
+   */
   function write(data, options) {
     scope.headerBytes = [0];
     scope.contentBytes = [];
@@ -32,6 +38,7 @@ function Writer(scope) {
     return this;
   }
 
+  /** @private */
   function splitBytes(encoded, key) {
     scope.headerBytes.push(scope.indices[key].index);
     fastPush.apply(scope.headerBytes, scope.indices[key].getSize(encoded.length));
@@ -50,6 +57,11 @@ function Writer(scope) {
     fastPush.apply(scope.contentBytes, res);
   }
 
+  /**
+   * Returns the byte sizes of a data object, for insight or troubleshooting
+   * @param {*} data The data to extract size information of
+   * @returns {Object} The detailed sizes information
+   */
   function sizes(data) {
     const s = {};
     for (let key in data) {
@@ -63,6 +75,7 @@ function Writer(scope) {
     return s;
   }
 
+  /** @private */
   function filterKeys(data) {
     const res = [];
     for (let key in data) {
@@ -71,22 +84,35 @@ function Writer(scope) {
     return res;
   }
 
+  /** @private */
   function concat(header, content) {
-    // return [...header, ...content];
     const res = [];
     fastPush.apply(res, header);
     fastPush.apply(res, content);
     return res;
   }
 
+  /**
+   * Returns the bytes from the header of the encoded data buffer.
+   * A fresh schema with no written data will return a blank, usable for partial encodings.
+   * @returns {Buffer} The header buffer
+   */
   function headerBuffer() {
     return Buffer.from(scope.headerBytes);
   }
 
+  /**
+   * Returns the bytes from the content of the encoded data buffer.
+   * @returns {Buffer} The content buffer
+   */
   function contentBuffer() {
     return Buffer.from(scope.contentBytes);
   }
 
+  /**
+   * Returns the bytes from the header AND content of the encoded data buffer.
+   * @returns {Buffer} The data buffer
+   */
   function buffer() {
     return Buffer.from(concat(scope.headerBytes, scope.contentBytes));
   }