diff --git a/breeze-sequelize/src/MetadataMapper.ts b/breeze-sequelize/src/MetadataMapper.ts
index 605a7d1..5a0b061 100644
--- a/breeze-sequelize/src/MetadataMapper.ts
+++ b/breeze-sequelize/src/MetadataMapper.ts
@@ -5,14 +5,17 @@ import * as utils from "./utils";
 
 let log = utils.log;
 
+/** Map name to Sequelize Model type */
 export interface NameModelMap { [modelName: string]: { new(): Model } & typeof Model };
 
 // TODO: still need to handle inherited entity types - TPT
 /** Maps Breeze metadata to Sequelize Models */
 export class MetadataMapper {
-  sequelize: Sequelize
-  metadataStore: MetadataStore;
+  readonly sequelize: Sequelize
+  readonly metadataStore: MetadataStore;
+  /** Maps entity type name to Sequelize Model */
   entityTypeSqModelMap: NameModelMap;
+  /** Maps resource name to Sequelize Model */
   resourceNameSqModelMap: NameModelMap;
 
   constructor(breezeMetadata: MetadataStore | string | Object, sequelize: Sequelize) {
diff --git a/breeze-sequelize/src/SQVisitor.ts b/breeze-sequelize/src/SQVisitor.ts
index 28a495a..373a9c5 100644
--- a/breeze-sequelize/src/SQVisitor.ts
+++ b/breeze-sequelize/src/SQVisitor.ts
@@ -5,6 +5,7 @@ import { FindOptions, IncludeOptions, LogicType, Op, Sequelize, WhereOptions } f
 import { Where } from "sequelize/types/lib/utils";
 import { SqVisitContext } from "./SequelizeQuery";
 
+/** Result of processing a query expression into Sequelize */
 export interface ExprResult {
   include: IncludeOptions[],
   lastInclude: IncludeOptions,
diff --git a/breeze-sequelize/src/SequelizeManager.ts b/breeze-sequelize/src/SequelizeManager.ts
index d6e4820..71d8ae2 100644
--- a/breeze-sequelize/src/SequelizeManager.ts
+++ b/breeze-sequelize/src/SequelizeManager.ts
@@ -17,10 +17,14 @@ export class SequelizeManager {
   sequelizeOptions: Options;
   dbConfig: DbConfig;
   sequelize: Sequelize;
+  /** Same as resourceNameSqModelMap */
   models: NameModelMap;
+  /** Maps resource name to Sequelize Model */
   resourceNameSqModelMap: NameModelMap;
+  /** Maps entity type name to Sequelize Model */
   entityTypeSqModelMap: NameModelMap;
   metadataStore: MetadataStore;
+  /** Generates keys for entity types where autoGeneratedKeyType = "KeyGenerator" */
   keyGenerator: KeyGenerator;
 
   constructor(dbConfig: DbConfig, sequelizeOptions: Options) {
diff --git a/breeze-sequelize/src/SequelizeQuery.ts b/breeze-sequelize/src/SequelizeQuery.ts
index 0939872..e628030 100644
--- a/breeze-sequelize/src/SequelizeQuery.ts
+++ b/breeze-sequelize/src/SequelizeQuery.ts
@@ -5,9 +5,11 @@ import { SequelizeManager } from "./SequelizeManager";
 import * as urlUtils from "url";
 import { toSQVisitor } from "./SQVisitor";
 
-// patch Breeze EntityQuery for server-side use
-// TODO make this a method on SequelizeQuery, so we don't have to patch Breeze?
-EntityQuery['fromUrl'] = function (url: string, resourceName: string) {
+/** Create an EntityQuery from a JSON-format breeze query string 
+ * @param url - url containing query, e.g. `/orders?{freight:{">":100}}`
+ * @param resourceName - Name of the resource/entity.  If omitted, resourceName is derived from the pathname of the url.
+*/
+export function entityQueryFromUrl(url: string, resourceName?: string): EntityQuery {
   let parsedUrl = urlUtils.parse(url, true);
   resourceName = resourceName || parsedUrl.pathname;
   // this is because everything after the '?' is turned into a query object with a single key
@@ -23,14 +25,19 @@ EntityQuery['fromUrl'] = function (url: string, resourceName: string) {
   // for debugging
   entityQuery['jsonQuery'] = jsonQuery;
   return entityQuery;
-}
+} 
+
+// patch Breeze EntityQuery for server-side use
+// TODO make this a method on SequelizeQuery, so we don't have to patch Breeze?
+EntityQuery['fromUrl'] = entityQueryFromUrl;
 
 export interface SequelizeQueryOptions {
   useTransaction: boolean;
   beforeQueryEntities: (sq: SequelizeQuery) => void;
 }
 
-interface CountModel {
+/** Object returned from a query with inlineCountEnabled */
+export interface CountModel {
   rows: Model[];
   count: number;
 }
diff --git a/breeze-sequelize/src/SequelizeSaveHandler.ts b/breeze-sequelize/src/SequelizeSaveHandler.ts
index faafe7e..dbc0f14 100644
--- a/breeze-sequelize/src/SequelizeSaveHandler.ts
+++ b/breeze-sequelize/src/SequelizeSaveHandler.ts
@@ -6,9 +6,9 @@ import { Model, Transaction } from "sequelize";
 import { KeyGenerator, SequelizeManager } from "./SequelizeManager";
 let toposort = require("toposort") as (ar: any[]) => any[];
 
-
+/** Save bundle from breeze client */
 export interface SaveRequest {
-  body: { entities: Entity[], saveOptions: SaveOptions }
+  body: { entities: Entity[], saveOptions?: SaveOptions }
 }
 
 interface EntityGroup {
@@ -18,15 +18,18 @@ interface EntityGroup {
 
 /** Handles saving entities from Breeze SaveChanges requests */
 export class SequelizeSaveHandler {
-  sequelizeManager: SequelizeManager;
-  metadataStore: MetadataStore;
-  entitiesFromClient: Entity[];
+  readonly sequelizeManager: SequelizeManager;
+  readonly metadataStore: MetadataStore;
+  readonly entitiesFromClient: Entity[];
   saveOptions: SaveOptions;
   private _keyMappings: KeyMapping[];
   private _fkFixupMap: { [entityKeyName: string]: any };
   private _savedEntities: Entity[];
+  /** Generates keys for entity types where autoGeneratedKeyType = "KeyGenerator" */
   keyGenerator: KeyGenerator;
-  beforeSaveEntity: (ei: EntityInfo) => EntityInfo;
+  /** Process an entity before save. If false is returned, entity is not saved. */
+  beforeSaveEntity: (ei: EntityInfo) => boolean;
+  /** Process all entities before save.  The entities in the returned SaveMap are saved. */
   beforeSaveEntities: (sm: SaveMap, trx?: Transaction) => SaveMap;
 
   /** Create an instance for the given save request */
@@ -44,7 +47,7 @@ export class SequelizeSaveHandler {
 
   }
 
-  /** Save the entities in the save request */
+  /** Save the entities in the save request, returning either the saved entities or an error collection */
   save(): Promise<{ errors: ServerEntityError[], message: string }> | Promise<Entity[]> {
     let beforeSaveEntity = (this.beforeSaveEntity || noopBeforeSaveEntity).bind(this);
     let entityTypeMap = {};
diff --git a/breeze-sequelize/src/dbUtils.ts b/breeze-sequelize/src/dbUtils.ts
index 63d4144..4eeb171 100644
--- a/breeze-sequelize/src/dbUtils.ts
+++ b/breeze-sequelize/src/dbUtils.ts
@@ -6,13 +6,15 @@ let log = utils.log;
 exports.connect = connect;
 exports.createDb = createDb;
 
+/** Config for connecting to a database */
 export interface DbConfig {
   dbName: string;
   user: string;
   password: string;
 }
 
-/** @returns Promise<"success"> or throws an error */
+/** Connect to existing database.
+ *  @returns Promise<"success"> or throws an error */
 export function connect(dbConfig: DbConfig, sequelizeOptions: Options): Promise<string> {
 
   let sequelize = new Sequelize(dbConfig.dbName, dbConfig.user, dbConfig.password, sequelizeOptions);
@@ -26,7 +28,8 @@ export function connect(dbConfig: DbConfig, sequelizeOptions: Options): Promise<
   });
 };
 
-/** @returns Promise<void> or throws an error */
+/** Create new database.
+ *  @returns Promise<void> or throws an error */
 export function createDb(dbConfig: DbConfig, sequelizeOptions: Options): Promise<void> {
   let sequelize = new Sequelize(null, dbConfig.user, dbConfig.password, sequelizeOptions);
   let statement = 'CREATE DATABASE ' + dbConfig.dbName;
diff --git a/breeze-sequelize/src/main.ts b/breeze-sequelize/src/main.ts
index 8e5c65d..544c476 100644
--- a/breeze-sequelize/src/main.ts
+++ b/breeze-sequelize/src/main.ts
@@ -1,4 +1,4 @@
-import { SequelizeQuery } from "./SequelizeQuery";
+import { SequelizeQuery, entityQueryFromUrl } from "./SequelizeQuery";
 import { SequelizeManager } from "./SequelizeManager";
 import { SequelizeSaveHandler } from "./SequelizeSaveHandler";
 import * as utils from "./utils";
@@ -6,4 +6,4 @@ import * as dbUtils from "./dbUtils";
 import { breeze } from "breeze-client";
 
 const Sequelize = SequelizeManager.Sequelize;
-export { SequelizeQuery, SequelizeManager, Sequelize, SequelizeSaveHandler, utils, dbUtils, breeze }
+export { SequelizeQuery, entityQueryFromUrl, SequelizeManager, Sequelize, SequelizeSaveHandler, utils, dbUtils, breeze }
diff --git a/breeze-sequelize/src/package.json b/breeze-sequelize/src/package.json
index 6fc3c9c..7f91a1b 100644
--- a/breeze-sequelize/src/package.json
+++ b/breeze-sequelize/src/package.json
@@ -1,6 +1,6 @@
 {
   "name": "breeze-sequelize",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "description": "Breeze Sequelize server implementation",
   "keywords": [
     "breeze",
@@ -19,21 +19,23 @@
   ],
   "directories": {},
   "dependencies": {
+    "toposort": "^2.0.2"
+  },
+  "peerDependencies": {
     "bluebird": "^3.7.2",
-    "breeze-client": ">=2.0.3",
+    "breeze-client": ">=2.0.4",
     "lodash": "^4.17.15",
-    "sequelize": "^5.21.3",
-    "toposort": "^2.0.2"
+    "sequelize": "^5.21.3"
   },
   "devDependencies": {
     "@types/bluebird": "^3.5.29",
     "@types/lodash": "^4.14.137",
-    "@types/node": "^12.12.25",
+    "@types/node": "^12.12.26",
     "@types/validator": "^12.0.1",
     "chai": "^4.2.0",
     "mocha": "^6.2.0",
-    "rimraf": "^3.0.0",
-    "typescript": "~3.4.5"
+    "rimraf": "^3.0.1",
+    "typescript": "^3.7.5"
   },
   "scripts": {
     "test": "mocha",
diff --git a/breeze-sequelize/src/utils.ts b/breeze-sequelize/src/utils.ts
index 3179088..1c998c0 100644
--- a/breeze-sequelize/src/utils.ts
+++ b/breeze-sequelize/src/utils.ts
@@ -1,4 +1,4 @@
-
+/** Wrapper around console.log.  Use `log.enabled` to enable/disable */
 export function log(s: any, ...args: any[]) {
   if (!log['enabled']) return;
   console.log('[Breeze] ' + s + '\n', args);
diff --git a/breeze-sequelize/test/package.json b/breeze-sequelize/test/package.json
index 467ba44..2074827 100644
--- a/breeze-sequelize/test/package.json
+++ b/breeze-sequelize/test/package.json
@@ -6,11 +6,12 @@
   "directories": {},
   "dependencies": {
     "bluebird": "^3.7.2",
-    "breeze-client": ">=2.0.3",
-    "breeze-sequelize": ">=0.4.0",
+    "breeze-client": ">=2.0.4",
+    "breeze-sequelize": "^0.4.1",
     "lodash": "^4.17.15",
     "mysql": "^2.18.0",
     "mysql2": "^1.7.0",
+    "sequelize": "^5.21.3",
     "uuid": "^3.4.0"
   },
   "devDependencies": {
@@ -21,6 +22,7 @@
   "scripts": {
     "test": "mocha",
     "debug": "node --inspect-brk node_modules/mocha/bin/mocha -b",
+    "install-lib": "npm install ../src/breeze-sequelize-0.4.1.tgz",
     "gen-model": "sequelize-auto -o \"./models\" -d northwindib -h localhost -u mysql -p 3306 -x mysql -e mysql"
   },
   "repository": {