diff --git a/package-lock.json b/package-lock.json
index 1d24fa6b..f5bbb29a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1969,7 +1969,7 @@
       "dependencies": {
         "minimist": {
           "version": "0.0.10",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.10.tgz",
+          "resolved": "http://registry.npmjs.org/minimist/-/minimist-0.0.10.tgz",
           "integrity": "sha1-3j+YVD2/lggr5IrRoMfNqDYwHc8=",
           "dev": true
         }
diff --git a/src/core/protocol/routes/search/MultiSearchRequest.ts b/src/core/protocol/routes/search/MultiSearchRequest.ts
index a1924b53..d8b4c207 100644
--- a/src/core/protocol/routes/search/MultiSearchRequest.ts
+++ b/src/core/protocol/routes/search/MultiSearchRequest.ts
@@ -13,6 +13,7 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {SCAbstractRoute, SCRouteHttpVerbs} from '../../../Route';
+import {SCMap} from '../../../types/Map';
 import {
   SCInternalServerErrorResponse,
   SCMethodNotAllowedErrorResponse,
@@ -33,9 +34,7 @@ import {SCSearchQuery} from './SearchRequest';
  *
  * @validatable
  */
-export interface SCMultiSearchRequest {
-  [k: string]: SCSearchQuery;
-}
+export type SCMultiSearchRequest = SCMap<SCSearchQuery>;
 
 /**
  * Route for submission of multiple search requests at once
diff --git a/src/core/protocol/routes/search/MultiSearchResponse.ts b/src/core/protocol/routes/search/MultiSearchResponse.ts
index bf3eef5d..1c14a3e3 100644
--- a/src/core/protocol/routes/search/MultiSearchResponse.ts
+++ b/src/core/protocol/routes/search/MultiSearchResponse.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018-2019 StApps
  * This program 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, version 3.
@@ -12,6 +12,7 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
+import {SCMap} from '../../../types/Map';
 import {SCSearchResult} from './SearchResponse';
 
 /**
@@ -21,6 +22,4 @@ import {SCSearchResult} from './SearchResponse';
  *
  * @validatable
  */
-export interface SCMultiSearchResponse {
-  [k: string]: SCSearchResult;
-}
+export type SCMultiSearchResponse = SCMap<SCSearchResult>;
diff --git a/src/core/types/config/Backend.ts b/src/core/types/config/Backend.ts
index 0efd305d..858e60ae 100644
--- a/src/core/types/config/Backend.ts
+++ b/src/core/types/config/Backend.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018-2019 StApps
  * This program 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, version 3.
@@ -79,19 +79,6 @@ export interface SCBackendConfigurationSortableField {
 
 }
 
-/**
- * Values of a field that should be boosted by the given factors
- */
-export interface SCBackendConfigurationSearchBoostingValues {
-
-  /**
-   * Value of the field that should be boosted by the given number
-   *
-   * For example `"SS 2019": 2`
-   */
-  [valueOfField: string]: number;
-}
-
 /**
  * A boosting configuration for one SCType
  */
@@ -103,11 +90,15 @@ export interface SCBackendConfigurationSearchBoosting {
   factor: number;
 
   /**
+   * Outer-Map:
    * Fields of this type that should be boosted if they match a given value
-   *
    * For nest fields you can use the `.` as a separator. For example `academicTerms.acronym`
+   * 
+   * Inner-map:
+   * Value of the field that should be boosted by the given number
+   * For example `"SS 2019": 2`
    */
-  fields?: SCMap<SCBackendConfigurationSearchBoostingValues>;
+  fields?: SCMap<SCMap<number>>;
 
   /**
    * Type of things the factor should be applied to
@@ -163,14 +154,10 @@ export interface SCBackendInternalConfiguration {
 /**
  * Configuration of the database
  */
-export interface SCBackendConfigurationDatabaseConfiguration {
+export interface SCBackendConfigurationDatabaseConfiguration extends SCMap<any> {
   /**
    * Name of the database used by the backend
    */
   name: string;
 
-  /**
-   * Allow additional configuration for the database
-   */
-  [key: string]: any;
 }
diff --git a/src/core/types/filters/Abstract.ts b/src/core/types/filters/Abstract.ts
index 5d2efaed..9cc3fbe7 100644
--- a/src/core/types/filters/Abstract.ts
+++ b/src/core/types/filters/Abstract.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018-2019 StApps
  * This program 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, version 3.
@@ -12,6 +12,7 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
+import {SCMap} from '../Map';
 /**
  * All available filter types
  */
@@ -47,9 +48,7 @@ export interface SCSearchAbstractFilter<T extends SCSearchAbstractFilterArgument
 /**
  * Arguments for the filter instruction
  */
-export interface SCSearchAbstractFilterArguments {
-  [key: string]: any;
-}
+export type SCSearchAbstractFilterArguments = SCMap<any>;
 
 /**
  * Available filter instructions
diff --git a/src/core/types/sorts/Abstract.ts b/src/core/types/sorts/Abstract.ts
index 26a93f9e..d25cf1d6 100644
--- a/src/core/types/sorts/Abstract.ts
+++ b/src/core/types/sorts/Abstract.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018-2019 StApps
  * This program 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, version 3.
@@ -13,6 +13,7 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {SCThingsField} from '../../Classes';
+import {SCMap} from '../Map';
 import {SCDistanceSort} from './Distance';
 import {SCDucetSort} from './Ducet';
 import {SCPriceSort} from './Price';
@@ -40,12 +41,7 @@ export interface SCSearchAbstractSort<T extends SCSearchAbstractSortArguments> {
 /**
  * Map of arguments for the sort instruction
  */
-export interface SCSearchAbstractSortArguments {
-  /**
-   * Index signature for additional arguments
-   */
-  [key: string]: any;
-
+export interface SCSearchAbstractSortArguments extends SCMap<any> {
   /**
    * Field to sort by
    */