diff --git a/src/bucket/QuoteDataBucket.d.ts b/src/bucket/QuoteDataBucket.d.ts
new file mode 100644
index 0000000..7f1c8e6
--- /dev/null
+++ b/src/bucket/QuoteDataBucket.d.ts
@@ -0,0 +1,123 @@
+/**
+ * Key/value store
+ *
+ *  Copyright (C) 2010-2019 R-T Specialty, LLC.
+ *
+ *  This file is part of liza.
+ *
+ *  liza is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+import { PositiveInteger } from "../numeric";
+
+
+/**
+ * General key/value store for document
+ *
+ * The term "Quote" here is an artifact from the initial design of the
+ * system used for insurance quoting.  It will be renamed.
+ *
+ * @todo Rename to DocumentDataBucket
+ */
+export declare class QuoteDataBucket
+{
+    /**
+     * Triggered when data in the bucket is updated, before it's committed
+     */
+    static readonly EVENT_UPDATE: string;
+
+
+    /**
+     * Explicitly sets the contents of the bucket
+     *
+     * @param data - associative array of the data
+     */
+    setValues( data: Record<string, any> ): this;
+
+
+    /**
+     * Alias of setValues
+     */
+    setCommittedValues(): this;
+
+
+    /**
+     * Clears all data from the bucket
+     */
+    clear(): this;
+
+
+    /**
+     * Overwrites values in the original bucket
+     *
+     * For this buckeet, overwriteValues() is an alias for setValues() without
+     * index merging. However, other Bucket implementations may handle it
+     * differently.
+     *
+     * @param data - associative array of the data
+     */
+    overwriteValues( data: Record<string, any> ): this;
+
+
+    /**
+     * Calls a function for each each of the values in the bucket
+     *
+     * Note: This format is intended to be consistent with Array.forEach()
+     *
+     * @param callback - function to call for each value in the bucket
+     */
+    each( callback: ( val: any, key: string) => {} ): this;
+
+
+    /**
+     * Calls a function for each each of the values in the bucket matching the
+     * given predicate
+     *
+     * @param pred - predicate
+     * @param c    - function to call for each value in the bucket
+     */
+    filter(
+        pred: ( key: string ) => {},
+        _c:   ( val: any, key: string) => {}
+    ): this;
+
+
+    /**
+     * Returns the data for the requested field
+     *
+     * @param name - name of the field (with or without trailing brackets)
+     *
+     * @return data for the field, or empty array if none
+     */
+    getDataByName( name: string ): any;
+
+
+    /**
+     * Returns the data as a JSON string
+     *
+     * @return data represented as JSON
+     */
+    getDataJson(): string;
+
+
+    /**
+     * Return raw bucket data
+     *
+     * TODO: remove; breaks encapsulation
+     *
+     * @return raw bucket data
+     */
+    getData(): Record<string, any>;
+}
diff --git a/src/bucket/StagingBucket.d.ts b/src/bucket/StagingBucket.d.ts
new file mode 100644
index 0000000..a96341f
--- /dev/null
+++ b/src/bucket/StagingBucket.d.ts
@@ -0,0 +1,206 @@
+/**
+ * StagingBucket class
+ *
+ *  Copyright (C) 2010-2019 R-T Specialty, LLC.
+ *
+ *  This file is part of the Liza Data Collection Framework.
+ *
+ *  liza is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import { PositiveInteger } from "../numeric";
+
+
+export type StagingBucketConstructor = (
+    bucket: StagingBucket
+) => StagingBucket;
+
+
+/**
+ * Stages and merges values into underlying key/value store
+ */
+export declare class StagingBucket
+{
+    /**
+     * Analgous to setValues(), but immediately commits the changes
+     *
+     * This still calls setValues() to ensure all events are properly kicked
+     * off.
+     *
+     * @param data - data to set and commit
+     */
+    setCommittedValues( data: Record<string, any> ): this;
+
+
+    /**
+     * Prevent #setCommittedValues from bypassing staging
+     *
+     * When set, #setCommittedValues will act as an alias of #setValues.
+     */
+    forbidBypass(): this;
+
+
+    /**
+     * Explicitly sets the contents of the bucket
+     *
+     * Because JSON serializes all undefined values to `null`, only the
+     * final null in a diff is considered terminating; the rest are
+     * converted into `undefined`.  Therefore, it is important that all
+     * truncations include no elements in the vector after the truncating null.
+     *
+     * @param given_data - associative array of the data
+     */
+    setValues( given_data: Record<string, any> ): this;
+
+
+    /**
+     * Overwrites values in the original bucket
+     *
+     * @param data - associative array of the data
+     */
+    overwriteValues( data: Record<string, any> ): this;
+
+
+    /**
+     * Returns staged data
+     *
+     * @return staged data
+     */
+    getDiff(): Record<string, any>;
+
+
+    /**
+     * Returns a field-oriented diff filled with all values rather than a
+     * value-oriented diff
+     *
+     * Only the fields that have changed are returned. Each field contains its
+     * actual value---not the diff representation of what portions of the field
+     * have changed.
+     *
+     * @return filled diff
+     */
+    getFilledDiff(): Record<string, any>;
+
+
+    /**
+     * Reverts staged changes, preventing them from being committed
+     *
+     * This will also generate a diff and raise the same events that would be
+     * raised by setting values in the conventional manner, allowing reverts to
+     * transparently integrate with the remainder of the system.
+     *
+     * @param evented - whether to emit events as part of the revert
+     */
+    revert( evented?: boolean ): this;
+
+
+    /**
+     * Commits staged changes, merging them with the bucket
+     *
+     * @param store - object to save old staged values to
+     */
+    commit( store?: { old: Record<string, any> } ): this
+
+
+    /**
+     * Clears all data from the bucket
+     */
+    clear(): this;
+
+
+    /**
+     * Calls a function for each each of the values in the bucket
+     *
+     * @param callback - function to call for each value in the bucket
+     */
+    each( callback: ( value: any, name: string ) => void ): this;
+
+
+    /**
+     * Returns the data for the requested field
+     *
+     * WARNING: This can be a potentially expensive operation if there is a
+     * great deal of staged data. The staged data is merged with the bucket data
+     * on each call. Do not make frequent calls to retrieve the same data. Cache
+     * it instead.
+     *
+     * @param name - field name (with or without trailing brackets)
+     *
+     * @return data for the field, or empty array if none
+     */
+    getDataByName( name: string ): Record<string, any>;
+
+
+    /**
+     * Returns original bucket data by name, even if there is data staged atop
+     * of it
+     *
+     * There is no additional overhead of this operation versus getDataByName()
+     *
+     * @param name - field name (with or without trailing brackets)
+     *
+     * @return data for the field, or empty array if none
+     */
+    getOriginalDataByName( name: string ): Record<string, any>;
+
+
+    /**
+     * Returns the data as a JSON string
+     *
+     * @return data represented as JSON
+     */
+    getDataJson(): string;
+
+
+    /**
+     * Return raw bucket data
+     *
+     * todo: remove; breaks encapsulation
+     *
+     * @return raw bucket data
+     */
+    getData(): Record<string, any>;
+
+
+    /**
+     * Calls a function for each each of the values in the bucket matching the
+     * given predicate
+     *
+     * @param pred - predicate
+     * @param c    - function to call for each value in the bucket
+     */
+    filter(
+        pred: ( name: string ) => boolean,
+        c:    ( value: any, name: string ) => void
+    ): this;
+
+
+    /**
+     * Returns true if the index for the given key exists
+     *
+     * @param name - the data key
+     * @param i    - the index
+     *
+     * @return whether the key exists
+     */
+    hasIndex( name: string, i: PositiveInteger ): boolean;
+
+
+    /**
+     * Returns true if the bucket has been changed and not saved
+     *
+     * @return true if the bucket has been changed and not saved
+     */
+    isDirty(): boolean;
+}
diff --git a/src/bucket/bucket_filter.d.ts b/src/bucket/bucket_filter.d.ts
new file mode 100644
index 0000000..f731956
--- /dev/null
+++ b/src/bucket/bucket_filter.d.ts
@@ -0,0 +1,65 @@
+/**
+ * Filters bucket data
+ *
+ *  Copyright (C) 2010-2019 R-T Specialty, LLC.
+ *
+ *  This file is part of the Liza Data Collection Framework.
+ *
+ *  liza is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+export declare module bucket_filter {
+
+    export type filter = {
+        /**
+         * Filters bucket data based on the provided types
+         *
+         * If a type is not provided, the data is considered to be unwanted and is
+         * removed entirely. Otherwise, the filter is applied to every element in the
+         * array.
+         *
+         * The data is modified in place.
+         *
+         * @param data         - data to filter
+         * @param key_types    - filter types
+         * @param ignore_types - types to ignore
+         * @param permit_null  - Allow nulls in results
+         *
+         * @return Object modified data
+         */
+        filter(
+            data:         Record<string, any>,
+            key_types:    Record<string, any>,
+            ignore_types: Record<string, boolean>,
+            permit_null:  boolean,
+        ): Record<string, any>
+
+
+        /**
+         * Filter bucket data based on values
+         *
+         * @param values      - The values to filter
+         * @param filter      - The filter to apply
+         * @param permit_null - Allow nulls in results
+         *
+         * @return the filtered values
+         */
+        filterValues(
+            values:      string[],
+            filter:      string,
+            permit_null: boolean,
+        ): string[];
+    };
+}
diff --git a/src/program/Program.d.ts b/src/program/Program.d.ts
index de3f45a..ec45efc 100644
--- a/src/program/Program.d.ts
+++ b/src/program/Program.d.ts
@@ -19,9 +19,13 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+import { StagingBucket } from "../bucket/StagingBucket";
+
 export declare abstract class Program
 {
     readonly ineligibleLockCount: number;
 
     getId(): string;
+
+    initQuote( bucket: StagingBucket, store_only: boolean ): void
 }
diff --git a/src/quote/BaseQuote.d.ts b/src/quote/BaseQuote.d.ts
index 9af47ee..f2271f4 100644
--- a/src/quote/BaseQuote.d.ts
+++ b/src/quote/BaseQuote.d.ts
@@ -23,6 +23,7 @@
 
 import { Program } from "../program/Program";
 import { Quote, QuoteId } from "./Quote";
+import { QuoteDataBucket } from "../bucket/QuoteDataBucket";
 
 
 export declare class BaseQuote implements Quote
@@ -90,4 +91,12 @@ export declare class BaseQuote implements Quote
      * @return last calculated time or 0
      */
     getLastPremiumDate(): UnixTimestamp;
+
+
+    /**
+     * Returns the bucket used to store the quote form data
+     *
+     * @return the data bucket
+     */
+    getBucket(): QuoteDataBucket
 }
diff --git a/src/server/quote/ServerSideQuote.d.ts b/src/server/quote/ServerSideQuote.d.ts
index 98eff98..c8bdf2f 100644
--- a/src/server/quote/ServerSideQuote.d.ts
+++ b/src/server/quote/ServerSideQuote.d.ts
@@ -23,6 +23,7 @@
 
 import { Program } from "../../program/Program";
 import { BaseQuote } from "../../quote/BaseQuote";
+import { QuoteDataBucket } from "../../bucket/QuoteDataBucket";
 
 
 export declare class ServerSideQuote extends BaseQuote
@@ -43,4 +44,28 @@ export declare class ServerSideQuote extends BaseQuote
      * @return self
      */
     setRatedDate( timestamp: UnixTimestamp ): this;
+
+
+    /**
+     * Set rating bucket
+     *
+     * @param bucket - the data bucket
+     */
+    setRateBucket( bucket: QuoteDataBucket ): this;
+
+
+    /**
+     * Set rating data
+     *
+     * @param data - rating data
+     */
+    setRatingData( data: Record<string, any> ): this;
+
+
+    /**
+     * Get rating data
+     *
+     * @return rating data
+     */
+    getRatingData(): Record<string, any>;
 }
diff --git a/src/server/quote/ServerSideQuote.js b/src/server/quote/ServerSideQuote.js
index b1040c3..3d5f7c0 100644
--- a/src/server/quote/ServerSideQuote.js
+++ b/src/server/quote/ServerSideQuote.js
@@ -40,7 +40,6 @@ module.exports = Class( 'ServerSideQuote' )
      */
     'private _creditScoreRef': 0,
 
-
     /**
      * Unix timestamp containing date of first premium calculation
      * @type {number}
@@ -53,6 +52,12 @@ module.exports = Class( 'ServerSideQuote' )
      */
     'private _metabucket': null,
 
+    /**
+     * Rating Data Bucket
+     * @type {Bucket}
+     */
+    'private _rate_bucket': null,
+
 
     'public setProgramVersion': function( version )
     {
@@ -148,6 +153,64 @@ module.exports = Class( 'ServerSideQuote' )
 
         this._metabucket.setValues( data );
         return this;
-    }
+    },
+
+
+    /**
+     * Set rating bucket
+     *
+     * @param {Bucket} bucket the rate bucket to set
+     */
+    'public setRateBucket': function( bucket )
+    {
+        this._rate_bucket = bucket;
+
+        return this;
+    },
+
+
+    /**
+     * Get rating bucket
+     *
+     * @return {Bucket}
+     */
+    'public getRateBucket': function()
+    {
+        return this._rate_bucket;
+    },
+
+
+    /**
+     * Set rating data
+     *
+     * @param {Object.<string,Array>} data rating data
+     */
+    'public setRatingData': function( data )
+    {
+        if ( !this._rate_bucket )
+        {
+            throw Error( "No rating bucket available for #setRatingData" );
+        }
+
+        this._rate_bucket.setValues( data );
+
+        return this;
+    },
+
+
+    /**
+     * Get rating data
+     *
+     * @return {Object.<string,Array>} rating data
+     */
+    'public getRatingData': function()
+    {
+        if ( !this._rate_bucket )
+        {
+            throw Error( "No rating bucket available for #setRatingData" );
+        }
+
+        return this._rate_bucket.getData();
+    },
 } );
 
diff --git a/src/server/request/DataProcessor.ts b/src/server/request/DataProcessor.ts
index 3d549e0..7483132 100644
--- a/src/server/request/DataProcessor.ts
+++ b/src/server/request/DataProcessor.ts
@@ -18,7 +18,9 @@
  *  You should have received a copy of the GNU General Public License
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+import { StagingBucket, StagingBucketConstructor } from "../../bucket/StagingBucket";
 import { PositiveInteger } from "../../numeric";
+import { bucket_filter } from "../../bucket/bucket_filter";
 import { UserRequest } from "./UserRequest";
 
 /**
@@ -41,10 +43,10 @@ export class DataProcessor
      * @param staging_ctor - staging bucket constructor
      */
     constructor(
-        private readonly _filter:       any,
+        private readonly _filter:       bucket_filter.filter,
         private readonly _dapif:        any,
         private readonly _meta_source:  any,
-        private readonly _stagingCtor:  any,
+        private readonly _stagingCtor:  StagingBucketConstructor,
     ) {}
 
 
@@ -169,7 +171,7 @@ export class DataProcessor
         dapi_manager: any,
         program:      any,
         data:         Record<string, any>,
-        bucket:       any,
+        bucket:       StagingBucket,
     ): [ any, Record<string, any> ]
     {
         const {
@@ -292,7 +294,7 @@ export class DataProcessor
      */
     private _mapDapiData(
         dapi:      any,
-        bucket:    any,
+        bucket:    StagingBucket,
         index:     PositiveInteger,
         diff_data: Record<string, any>,
     ): Record<string, any>
diff --git a/test/server/quote/ServerSideQuoteTest.js b/test/server/quote/ServerSideQuoteTest.js
index aea8cc8..8e92a67 100644
--- a/test/server/quote/ServerSideQuoteTest.js
+++ b/test/server/quote/ServerSideQuoteTest.js
@@ -21,8 +21,14 @@
 
 'use strict';
 
-const { expect } = require( 'chai' );
-const Sut        = require( '../../..' ).server.quote.ServerSideQuote;
+const root   = require( '../../..' );
+const Sut    = require( '../../..' ).server.quote.ServerSideQuote;
+const expect = require( 'chai' ).expect;
+const sinon  = require( 'sinon' );
+
+const {
+    QuoteDataBucket,
+} = root.bucket;
 
 describe( 'ServerSideQuote', () =>
 {
@@ -31,80 +37,85 @@ describe( 'ServerSideQuote', () =>
         [
             {
                 property: 'startDate',
-                default: 0,
-                value: 946684800
+                default:  0,
+                value:    946684800
             },
             {
                 property: 'initialRatedDate',
-                default: 0,
-                value: 946684800
+                default:  0,
+                value:    946684800
             },
             {
                 property: 'agentId',
-                default: 0,
-                value: 12345678
+                default:  0,
+                value:    12345678
             },
             {
                 property: 'agentEntityId',
-                default: 0,
-                value: 12345678
+                default:  0,
+                value:    12345678
             },
             {
                 property: 'agentName',
-                default: '',
-                value: 'name'
+                default:  '',
+                value:    'name'
             },
             {
                 property: 'imported',
-                default: false,
-                value: true,
+                default:  false,
+                value:    true,
                 accessor: 'is'
             },
             {
                 property: 'bound',
-                default: false,
-                value: true,
+                default:  false,
+                value:    true,
                 accessor: 'is'
             },
             {
                 property: 'currentStepId',
-                default: 1,
-                value: 2
+                default:  1,
+                value:    2
             },
             {
                 property: 'topVisitedStepId',
-                default: 1,
-                value: 2
+                default:  1,
+                value:    2
             },
             {
                 property: 'topSavedStepId',
-                value: 1
+                value:    1
             },
             {
                 property: 'error',
-                default: '',
-                value: 'ERROR'
+                default:  '',
+                value:    'ERROR'
             },
             {
                 property: 'programVersion',
-                default: '',
-                value: '1.0.0'
+                default:  '',
+                value:    '1.0.0'
             },
             {
                 property: 'creditScoreRef',
-                default: 0,
-                value: 800
+                default:  0,
+                value:    800
             },
             {
                 property: 'lastPremiumDate',
-                default: 0,
-                value: 946684800
+                default:  0,
+                value:    946684800
             },
             {
                 property: 'ratedDate',
-                default: 0,
-                value: 946684800
-            }
+                default:  0,
+                value:    946684800
+            },
+            {
+                property: 'rateBucket',
+                default:  null,
+                value:    QuoteDataBucket()
+            },
 
         ].forEach( testCase =>
         {
@@ -122,4 +133,44 @@ describe( 'ServerSideQuote', () =>
             } );
         } );
     } );
-} );
\ No newline at end of file
+
+    describe( 'rating data', () =>
+    {
+        it( `#setRatingData throws an error if no bucket is set`, () =>
+        {
+            const data = { foo: 'bar' };
+            const sut  = Sut();
+
+            expect( function() { sut.setRatingData( data ); } )
+                .to.throw( Error );
+        } );
+
+        it( `Bucket values setters/getters work correctly`, () =>
+        {
+            const data        = { foo: 'bar' };
+            let   bucket_data = null;
+            const sut         = Sut();
+            var   called      = false;
+
+            const bucket = {
+                setValues( gdata )
+                {
+                    expect( gdata ).to.deep.equal( data );
+
+                    bucket_data = gdata;
+                    called      = true;
+                },
+
+                getData()
+                {
+                    return bucket_data;
+                },
+            };
+
+            sut.setRateBucket( bucket );
+            sut.setRatingData( data );
+
+            expect( called ).to.equal( true );
+        } );
+    } );
+} );
diff --git a/test/server/request/DataProcessorTest.ts b/test/server/request/DataProcessorTest.ts
index faf69bf..361d99a 100644
--- a/test/server/request/DataProcessorTest.ts
+++ b/test/server/request/DataProcessorTest.ts
@@ -25,6 +25,7 @@ import { DocumentId } from "../../../src/document/Document";
 import { PositiveInteger } from "../../../src/numeric";
 import { UserRequest } from "../../../src/server/request/UserRequest";
 import { ServerSideQuote } from "../../../src/server/quote/ServerSideQuote";
+import { QuoteDataBucket } from "../../../src/bucket/QuoteDataBucket";
 
 chai_use( require( 'chai-as-promised' ) );
 
@@ -711,7 +712,7 @@ function createStubQuote()
 
         getBucket()
         {
-            return;
+            return new QuoteDataBucket();
         }
     };
 }
diff --git a/test/server/service/RatingServiceTest.ts b/test/server/service/RatingServiceTest.ts
index 1b7f7d7..3bc72c0 100644
--- a/test/server/service/RatingServiceTest.ts
+++ b/test/server/service/RatingServiceTest.ts
@@ -35,6 +35,7 @@ import { ServerSideQuote } from "../../../src/server/quote/ServerSideQuote";
 import { UserRequest } from "../../../src/server/request/UserRequest";
 import { UserResponse } from "../../../src/server/request/UserResponse";
 import { UserSession } from "../../../src/server/request/UserSession";
+import { QuoteDataBucket } from "../../../src/bucket/QuoteDataBucket";
 
 import {
     ServerDao,
@@ -140,7 +141,7 @@ describe( 'RatingService', () =>
             .then( () => expect( sent ).to.be.true );
     } );
 
-    it( "saves rate data to own field", () =>
+    it( "saves rate data to it's own field", () =>
     {
         const {
             logger,
@@ -510,6 +511,10 @@ function getStubs()
         getLastPremiumDate: () => <UnixTimestamp>0,
         getCurrentStepId:   () => 0,
         setExplicitLock:    () => quote,
+        setRateBucket:      () => quote,
+        setRatingData:      () => quote,
+        getRatingData:      () => stub_rate_data,
+        getBucket:          () => new QuoteDataBucket(),
     };
 
     return {