diff --git a/.gitignore b/.gitignore
index 6763725f3cd343f63f5b6f9f57c6b32a1998efd8..9f41c70bbf29dea9564beae396dfd34baf8d9f8e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,3 +26,5 @@ hs_err_pid*
 .Rhistory
 *.Rproj
 Rplots.pdf
+.idea
+.gradle
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000000000000000000000000000000000000..6819940b26065a4c071bab12c3f47d18acadcfab
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,6 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * This is a general purpose Gradle build.
+ * Learn how to create Gradle builds at https://guides.gradle.org/creating-new-gradle-builds/
+ */
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000000000000000000000000000000000000..ea13fdfd1928b75ee0a57e9320ea8e1c9c8b5aa5
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.3.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000000000000000000000000000000000000..b0d6d0ab5deb588123dd658f0b079934ee05a72e
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,188 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# 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.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000000000000000000000000000000000000..15e1ee37a70d7dfdfd8cf727022e117b6f6153a7
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,100 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      http://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000000000000000000000000000000000000..406f9b03d0db200b181bc90b74ebcab4ab57255e
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,13 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * The settings file is used to specify which projects to include in your build.
+ *
+ * Detailed information about configuring a multi-project build in Gradle can be found
+ * in the user guide at https://docs.gradle.org/4.10.3/userguide/multi_project_builds.html
+ */
+
+rootProject.name = 'ttc2019-tt2bdd'
+
+include ':solutions:RelationalRAGSolution'
+include ':solutions:EMFSolutionATL'
\ No newline at end of file
diff --git a/solutions/RelationalRAGSolution/.gitignore b/solutions/RelationalRAGSolution/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..ad705aa2438983dc339d5b2fa5fc3cd4bbd807e2
--- /dev/null
+++ b/solutions/RelationalRAGSolution/.gitignore
@@ -0,0 +1,30 @@
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+*/out/
+*.iml
+/.idea/*
+!.idea/codeStyles
+!libs/relast.jar
+
+src/gen/
+*.ast
+src/main/jastadd/TTBDD.jadd
+src/main/jastadd/TTBDDRefResolver.jadd
+src/main/jastadd/TTBDDResolverStubs.jrag
+build/
\ No newline at end of file
diff --git a/solutions/RelationalRAGSolution/build.gradle b/solutions/RelationalRAGSolution/build.gradle
new file mode 100644
index 0000000000000000000000000000000000000000..ae8b0c92c4ce2f3ecc843e38462ab998fedc3dd3
--- /dev/null
+++ b/solutions/RelationalRAGSolution/build.gradle
@@ -0,0 +1,124 @@
+group 'de.tudresden.inf.st'
+version '1.0-SNAPSHOT'
+
+apply plugin: 'java'
+apply plugin: 'application'
+apply plugin: 'idea'
+
+sourceCompatibility = 1.8
+
+repositories {
+    mavenCentral()
+}
+
+idea {
+    module {
+        generatedSourceDirs += file('src/gen/java')
+    }
+}
+
+configurations {
+    ragdoc
+}
+
+sourceSets {
+    main {
+        java.srcDir "src/gen/java"
+    }
+}
+
+test {
+    useJUnitPlatform()
+}
+
+task cleanRagdoc(type: Delete) {
+    group = 'documentation'
+    new File(docsDir, 'ragdoc').deleteDir()
+}
+
+dependencies {
+
+    compile 'org.jastadd:jastadd:2.3.2'
+    compile group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.8.8.1'
+    compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.10.0'
+    compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.10.0'
+
+    ragdoc files('libs/rd-builder.jar')
+}
+
+run {
+    mainClassName = 'de.tudresden.inf.st.mquat.Main'
+    standardInput = System.in
+    if (project.hasProperty("appArgs")) {
+        args Eval.me(appArgs)
+    }
+}
+
+buildscript {
+    repositories.mavenCentral()
+}
+
+
+jar {
+    manifest {
+        attributes(
+                'Class-Path': configurations.compile.collect { it.getName() }.join(' '),
+                'Main-Class': 'de.tudresden.inf.st.ttc19.Main'
+        )
+    }
+}
+
+task preprocess(type: JavaExec) {
+    group = 'Build'
+    main = "-jar"
+
+    doFirst {
+        delete "./src/main/jastadd/*.ast"
+        delete "./src/main/jastadd/TTBDD.jadd"
+        delete "./src/main/jastadd/TTBDDRefResolver.jadd"
+    }
+
+    args = [
+            "libs/relast.jar",
+            "./src/main/jastadd/TT.relast",
+            "./src/main/jastadd/BDD.relast",
+            "--listClass=ArrayList",
+            "--jastAddList=JastAddList",
+            "--file",
+            "--resolverHelper",
+            "--grammarName=./src/main/jastadd/TTBDD"
+    ]
+
+    inputs.files file("./src/main/jastadd/TT.relast"), file("./src/main/jastadd/BDD.relast"), file("./libs/relast.jar")
+    outputs.files file("./src/main/jastadd/Mquat.ast"), file("./src/main/jastadd/Mquat.jadd"), file("./src/main/jastadd/MquatRefResolver.jadd")
+}
+
+task jastadd2(type: JavaExec) {
+    classpath=configurations.compile
+    group = 'Build'
+    main = 'org.jastadd.JastAdd'
+    args = ["--cache=all",
+            "--flush=full",
+            "--list=JastAddList",
+            "--rewrite=cnta",
+            "--package=de.tudresden.inf.st.ttc19.jastadd.model",
+            "--o=src/gen/java"
+    ] + fileTree("./src/main/jastadd/").matching {exclude "*.relast"}
+
+    doFirst {
+        delete fileTree('src/gen/java/')
+    }
+
+    inputs.files fileTree("./solve/src/main/jastadd/") + file("libs/jastadd2.jar")
+    outputs.files file("src/gen/java/ASTNode.java")
+}
+
+clean.doFirst {
+    delete "./src/main/jastadd/Mquat.ast"
+    delete "./src/main/jastadd/Mquat.jadd"
+    delete "./src/main/jastadd/MquatRefResolver.jadd"
+}
+
+
+jastadd2.dependsOn preprocess
+compileJava.dependsOn jastadd2
diff --git a/solutions/RelationalRAGSolution/libs/relast.jar b/solutions/RelationalRAGSolution/libs/relast.jar
new file mode 100644
index 0000000000000000000000000000000000000000..1437dc7e386d47033e5bdeb34b6bafbd845aa9be
Binary files /dev/null and b/solutions/RelationalRAGSolution/libs/relast.jar differ
diff --git a/solutions/RelationalRAGSolution/src/main/jastadd/BDD.relast b/solutions/RelationalRAGSolution/src/main/jastadd/BDD.relast
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/solutions/RelationalRAGSolution/src/main/jastadd/TT.relast b/solutions/RelationalRAGSolution/src/main/jastadd/TT.relast
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391