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diff --git a/Firestore/Protos/protos/google/firestore/v1beta1/query.proto b/Firestore/Protos/protos/google/firestore/v1beta1/query.proto
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+// Copyright 2017 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package google.firestore.v1beta1;
+
+import "google/api/annotations.proto";
+import "google/firestore/v1beta1/document.proto";
+import "google/protobuf/wrappers.proto";
+
+option csharp_namespace = "Google.Cloud.Firestore.V1Beta1";
+option go_package = "google.golang.org/genproto/googleapis/firestore/v1beta1;firestore";
+option java_multiple_files = true;
+option java_outer_classname = "QueryProto";
+option java_package = "com.google.firestore.v1beta1";
+option objc_class_prefix = "GCFS";
+
+
+// A Firestore query.
+message StructuredQuery {
+  // A selection of a collection, such as `messages as m1`.
+  message CollectionSelector {
+    // The collection ID.
+    // When set, selects only collections with this ID.
+    string collection_id = 2;
+
+    // When false, selects only collections that are immediate children of
+    // the `parent` specified in the containing `RunQueryRequest`.
+    // When true, selects all descendant collections.
+    bool all_descendants = 3;
+  }
+
+  // A filter.
+  message Filter {
+    // The type of filter.
+    oneof filter_type {
+      // A composite filter.
+      CompositeFilter composite_filter = 1;
+
+      // A filter on a document field.
+      FieldFilter field_filter = 2;
+
+      // A filter that takes exactly one argument.
+      UnaryFilter unary_filter = 3;
+    }
+  }
+
+  // A filter that merges multiple other filters using the given operator.
+  message CompositeFilter {
+    // A composite filter operator.
+    enum Operator {
+      // Unspecified. This value must not be used.
+      OPERATOR_UNSPECIFIED = 0;
+
+      // The results are required to satisfy each of the combined filters.
+      AND = 1;
+    }
+
+    // The operator for combining multiple filters.
+    Operator op = 1;
+
+    // The list of filters to combine.
+    // Must contain at least one filter.
+    repeated Filter filters = 2;
+  }
+
+  // A filter on a specific field.
+  message FieldFilter {
+    // A field filter operator.
+    enum Operator {
+      // Unspecified. This value must not be used.
+      OPERATOR_UNSPECIFIED = 0;
+
+      // Less than. Requires that the field come first in `order_by`.
+      LESS_THAN = 1;
+
+      // Less than or equal. Requires that the field come first in `order_by`.
+      LESS_THAN_OR_EQUAL = 2;
+
+      // Greater than. Requires that the field come first in `order_by`.
+      GREATER_THAN = 3;
+
+      // Greater than or equal. Requires that the field come first in
+      // `order_by`.
+      GREATER_THAN_OR_EQUAL = 4;
+
+      // Equal.
+      EQUAL = 5;
+    }
+
+    // The field to filter by.
+    FieldReference field = 1;
+
+    // The operator to filter by.
+    Operator op = 2;
+
+    // The value to compare to.
+    Value value = 3;
+  }
+
+  // A filter with a single operand.
+  message UnaryFilter {
+    // A unary operator.
+    enum Operator {
+      // Unspecified. This value must not be used.
+      OPERATOR_UNSPECIFIED = 0;
+
+      // Test if a field is equal to NaN.
+      IS_NAN = 2;
+
+      // Test if an exprestion evaluates to Null.
+      IS_NULL = 3;
+    }
+
+    // The unary operator to apply.
+    Operator op = 1;
+
+    // The argument to the filter.
+    oneof operand_type {
+      // The field to which to apply the operator.
+      FieldReference field = 2;
+    }
+  }
+
+  // An order on a field.
+  message Order {
+    // The field to order by.
+    FieldReference field = 1;
+
+    // The direction to order by. Defaults to `ASCENDING`.
+    Direction direction = 2;
+  }
+
+  // A reference to a field, such as `max(messages.time) as max_time`.
+  message FieldReference {
+    string field_path = 2;
+  }
+
+  // The projection of document's fields to return.
+  message Projection {
+    // The fields to return.
+    //
+    // If empty, all fields are returned. To only return the name
+    // of the document, use `['__name__']`.
+    repeated FieldReference fields = 2;
+  }
+
+  // A sort direction.
+  enum Direction {
+    // Unspecified.
+    DIRECTION_UNSPECIFIED = 0;
+
+    // Ascending.
+    ASCENDING = 1;
+
+    // Descending.
+    DESCENDING = 2;
+  }
+
+  // The projection to return.
+  Projection select = 1;
+
+  // The collections to query.
+  repeated CollectionSelector from = 2;
+
+  // The filter to apply.
+  Filter where = 3;
+
+  // The order to apply to the query results.
+  //
+  // Firestore guarantees a stable ordering through the following rules:
+  //
+  //  * Any field required to appear in `order_by`, that is not already
+  //    specified in `order_by`, is appended to the order in field name order
+  //    by default.
+  //  * If an order on `__name__` is not specified, it is appended by default.
+  //
+  // Fields are appended with the same sort direction as the last order
+  // specified, or 'ASCENDING' if no order was specified. For example:
+  //
+  //  * `SELECT * FROM Foo ORDER BY A` becomes
+  //    `SELECT * FROM Foo ORDER BY A, __name__`
+  //  * `SELECT * FROM Foo ORDER BY A DESC` becomes
+  //    `SELECT * FROM Foo ORDER BY A DESC, __name__ DESC`
+  //  * `SELECT * FROM Foo WHERE A > 1` becomes
+  //    `SELECT * FROM Foo WHERE A > 1 ORDER BY A, __name__`
+  repeated Order order_by = 4;
+
+  // A starting point for the query results.
+  Cursor start_at = 7;
+
+  // A end point for the query results.
+  Cursor end_at = 8;
+
+  // The number of results to skip.
+  //
+  // Applies before limit, but after all other constraints. Must be >= 0 if
+  // specified.
+  int32 offset = 6;
+
+  // The maximum number of results to return.
+  //
+  // Applies after all other constraints.
+  // Must be >= 0 if specified.
+  google.protobuf.Int32Value limit = 5;
+}
+
+// A position in a query result set.
+message Cursor {
+  // The values that represent a position, in the order they appear in
+  // the order by clause of a query.
+  //
+  // Can contain fewer values than specified in the order by clause.
+  repeated Value values = 1;
+
+  // If the position is just before or just after the given values, relative
+  // to the sort order defined by the query.
+  bool before = 2;
+}