diff --git a/csdl/api/pom.xml b/csdl/api/pom.xml
new file mode 100644
index 0000000..935edd8
--- /dev/null
+++ b/csdl/api/pom.xml
@@ -0,0 +1,83 @@
+<?xml version="1.0"?>
+<!--
+/*********************************************************************
+* Copyright (c) 2024 Contributors to the Eclipse Foundation.
+*
+* This program and the accompanying materials are made
+* available under the terms of the Eclipse Public License 2.0
+* which is available at https://www.eclipse.org/legal/epl-2.0/
+*
+* SPDX-License-Identifier: EPL-2.0
+**********************************************************************/
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.eclipse.daanse</groupId>
+    <artifactId>org.eclipse.daanse.olap.csdl</artifactId>
+    <version>${revision}</version>
+  </parent>
+  <artifactId>org.eclipse.daanse.olap.csdl.api</artifactId>
+  <name>Eclipse Daanse OLAP Check Runtime</name>
+  <description>OLAP CSDL api.</description>
+
+  <properties>
+    <gecko.emf.version>6.2.0</gecko.emf.version>
+    <emf.common.version>2.30.0</emf.common.version>
+    <emf.ecore.version>2.36.0</emf.ecore.version>
+    <emf.ecore.xmi.version>2.37.0</emf.ecore.xmi.version>
+  </properties>
+
+  <dependencies>
+    <!-- CSDL Model -->
+    <!--dependency>
+      <groupId>org.eclipse.daanse</groupId>
+      <artifactId>org.eclipse.daanse.xmla.csdl.model</artifactId>
+      <version>${project.version}</version>
+    </dependency-->
+
+    <dependency>
+      <groupId>org.eclipse.daanse</groupId>
+      <artifactId>org.eclipse.daanse.xmla.csdl.model.v2.edm</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+
+    <!-- Gecko EMF OSGi -->
+    <dependency>
+      <groupId>org.geckoprojects.emf</groupId>
+      <artifactId>org.gecko.emf.osgi.api</artifactId>
+      <version>${gecko.emf.version}</version>
+    </dependency>
+
+    <!-- EMF Runtime -->
+    <dependency>
+      <groupId>org.eclipse.emf</groupId>
+      <artifactId>org.eclipse.emf.common</artifactId>
+      <version>${emf.common.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.eclipse.emf</groupId>
+      <artifactId>org.eclipse.emf.ecore</artifactId>
+      <version>${emf.ecore.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.eclipse.emf</groupId>
+      <artifactId>org.eclipse.emf.ecore.xmi</artifactId>
+      <version>${emf.ecore.xmi.version}</version>
+    </dependency>
+
+    <!-- OSGi -->
+    <dependency>
+      <groupId>org.osgi</groupId>
+      <artifactId>org.osgi.service.component.annotations</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.osgi</groupId>
+      <artifactId>org.osgi.service.metatype.annotations</artifactId>
+      <scope>provided</scope>
+    </dependency>
+  </dependencies>
+</project>
diff --git a/csdl/api/src/main/java/org/eclipse/daanse/olap/csdl/api/OlapTSchemaSupplier.java b/csdl/api/src/main/java/org/eclipse/daanse/olap/csdl/api/OlapTSchemaSupplier.java
new file mode 100644
index 0000000..a86ff4c
--- /dev/null
+++ b/csdl/api/src/main/java/org/eclipse/daanse/olap/csdl/api/OlapTSchemaSupplier.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2025 Contributors to the Eclipse Foundation.
+ *
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *   SmartCity Jena - initial
+ *   Stefan Bischof (bipolis.org) - initial
+ */
+package org.eclipse.daanse.olap.csdl.api;
+
+import java.util.function.Supplier;
+
+import org.eclipse.daanse.xmla.csdl.model.v2.edm.TSchema;
+
+/**
+ * Supplier interface for providing an OlapCheckSuite. Implementations can load
+ * suites from various sources (XMI files, JSON, etc.) and are aggregated by the
+ * OlapCheckSuiteRegistry.
+ */
+public interface OlapTSchemaSupplier extends Supplier<TSchema> {
+
+}
diff --git a/csdl/api/src/main/java/org/eclipse/daanse/olap/csdl/api/package-info.java b/csdl/api/src/main/java/org/eclipse/daanse/olap/csdl/api/package-info.java
new file mode 100644
index 0000000..db584ef
--- /dev/null
+++ b/csdl/api/src/main/java/org/eclipse/daanse/olap/csdl/api/package-info.java
@@ -0,0 +1,16 @@
+/*
+* Copyright (c) 2025 Contributors to the Eclipse Foundation.
+*
+* This program and the accompanying materials are made
+* available under the terms of the Eclipse Public License 2.0
+* which is available at https://www.eclipse.org/legal/epl-2.0/
+*
+* SPDX-License-Identifier: EPL-2.0
+*
+* Contributors:
+*   SmartCity Jena - initial
+*/
+
+@org.osgi.annotation.bundle.Export
+@org.osgi.annotation.versioning.Version("0.0.1")
+package org.eclipse.daanse.olap.csdl.api;
\ No newline at end of file
diff --git a/csdl/pom.xml b/csdl/pom.xml
new file mode 100644
index 0000000..7652615
--- /dev/null
+++ b/csdl/pom.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0"?>
+<!--
+/*********************************************************************
+* Copyright (c) 2024 Contributors to the Eclipse Foundation.
+*
+* This program and the accompanying materials are made
+* available under the terms of the Eclipse Public License 2.0
+* which is available at https://www.eclipse.org/legal/epl-2.0/
+*
+* SPDX-License-Identifier: EPL-2.0
+**********************************************************************/
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.eclipse.daanse</groupId>
+    <artifactId>org.eclipse.daanse.olap</artifactId>
+    <version>${revision}</version>
+  </parent>
+  <artifactId>org.eclipse.daanse.olap.csdl</artifactId>
+  <packaging>pom</packaging>
+  <name>Eclipse Daanse OLAP CSDL</name>
+  <description>OLAP CSDL.</description>
+
+  <modules>
+    <module>api</module>
+  </modules>
+
+</project>
diff --git a/pom.xml b/pom.xml
index cb584b4..e8d12cf 100644
--- a/pom.xml
+++ b/pom.xml
@@ -62,6 +62,7 @@
     <module>format</module>
     <module>odc</module>
     <module>check</module>
+    <module>csdl</module>
   </modules>
 
   <dependencies>