diff --git a/src/libcalamaresui/modulesystem/CppJobModule.cpp b/src/libcalamaresui/modulesystem/CppJobModule.cpp
index c6571dbf6..2eddeda86 100644
--- a/src/libcalamaresui/modulesystem/CppJobModule.cpp
+++ b/src/libcalamaresui/modulesystem/CppJobModule.cpp
@@ -86,7 +86,6 @@ CppJobModule::jobs() const
 void
 CppJobModule::initFrom( const QVariantMap& moduleDescriptor )
 {
-    Module::initFrom( moduleDescriptor );
     QDir directory( location() );
     QString load;
     if ( !moduleDescriptor.value( "load" ).toString().isEmpty() )
diff --git a/src/libcalamaresui/modulesystem/Module.cpp b/src/libcalamaresui/modulesystem/Module.cpp
index 799da941e..2d2ea3def 100644
--- a/src/libcalamaresui/modulesystem/Module.cpp
+++ b/src/libcalamaresui/modulesystem/Module.cpp
@@ -27,6 +27,7 @@
 
 #include "utils/Dirs.h"
 #include "utils/Logger.h"
+#include "utils/NamedEnum.h"
 #include "utils/Yaml.h"
 
 #ifdef WITH_PYTHON
@@ -48,8 +49,23 @@ static const char EMERGENCY[] = "emergency";
 namespace Calamares
 {
 
+Module::Module()
+    : m_loaded( false )
+{
+}
+
 Module::~Module() {}
 
+void
+Module::initFrom( const QVariantMap& moduleDescriptor, const QString& id )
+{
+    m_key = ModuleSystem::InstanceKey( moduleDescriptor.value( "name" ).toString(), id );
+    if ( moduleDescriptor.contains( EMERGENCY ) )
+    {
+        m_maybe_emergency = moduleDescriptor[ EMERGENCY ].toBool();
+    }
+}
+
 Module*
 Module::fromDescriptor( const QVariantMap& moduleDescriptor,
                         const QString& instanceId,
@@ -131,7 +147,12 @@ Module::fromDescriptor( const QVariantMap& moduleDescriptor,
         return nullptr;
     }
 
-    m->m_instanceId = instanceId;
+    m->initFrom( moduleDescriptor, instanceId );
+    if ( !m->m_key.isValid() )
+    {
+        cError() << "Module" << instanceId << "invalid ID";
+        return nullptr;
+    }
 
     m->initFrom( moduleDescriptor );
     try
@@ -190,7 +211,7 @@ moduleConfigurationCandidates( bool assumeBuildDir, const QString& moduleName, c
 void Module::loadConfigurationFile( const QString& configFileName )  //throws YAML::Exception
 {
     QStringList configCandidates
-        = moduleConfigurationCandidates( Settings::instance()->debugMode(), m_name, configFileName );
+        = moduleConfigurationCandidates( Settings::instance()->debugMode(), name(), configFileName );
     for ( const QString& path : configCandidates )
     {
         QFile configFile( path );
@@ -219,67 +240,59 @@ void Module::loadConfigurationFile( const QString& configFileName )  //throws YA
             return;
         }
     }
-    cDebug() << "No config file for" << m_name << "found anywhere at" << Logger::DebugList( configCandidates );
+    cDebug() << "No config file for" << name() << "found anywhere at" << Logger::DebugList( configCandidates );
 }
 
 
-QString
-Module::name() const
+static const NamedEnumTable< Module::Type >&
+typeNames()
 {
-    return m_name;
+    using Type = Module::Type;
+    // *INDENT-OFF*
+    // clang-format off
+    static const NamedEnumTable< Type > table{
+        { QStringLiteral( "job" ), Type::Job },
+        { QStringLiteral( "view" ), Type::View },
+        { QStringLiteral( "viewmodule" ), Type::View },
+        { QStringLiteral( "jobmodule" ), Type::Job }
+    };
+    // *INDENT-ON*
+    // clang-format on
+    return table;
 }
 
-
-QString
-Module::instanceId() const
-{
-    return m_instanceId;
-}
-
-
-QString
-Module::instanceKey() const
-{
-    return QString( "%1@%2" ).arg( m_name ).arg( m_instanceId );
-}
-
-
-QString
-Module::location() const
-{
-    return m_directory;
-}
-
-
 QString
 Module::typeString() const
 {
-    switch ( type() )
-    {
-    case Type::Job:
-        return "Job Module";
-    case Type::View:
-        return "View Module";
-    }
-    return QString();
+    bool ok = false;
+    QString v = typeNames().find( type(), ok );
+    return ok ? v : QString();
 }
 
 
+static const NamedEnumTable< Module::Interface >&
+interfaceNames()
+{
+    using Interface = Module::Interface;
+    // *INDENT-OFF*
+    // clang-format off
+    static const NamedEnumTable< Interface > table {
+        { QStringLiteral("process"), Interface::Process },
+        { QStringLiteral("qtplugin"), Interface::QtPlugin },
+        { QStringLiteral("python"), Interface::Python },
+        { QStringLiteral("pythonqt"), Interface::PythonQt }
+    };
+    // *INDENT-ON*
+    // clang-format on
+    return table;
+}
+
 QString
 Module::interfaceString() const
 {
-    switch ( interface() )
-    {
-    case Interface::Process:
-        return "External process";
-    case Interface::Python:
-        return "Python (Boost.Python)";
-    case Interface::PythonQt:
-        return "Python (experimental)";
-    case Interface::QtPlugin:
-        return "Qt Plugin";
-    }
-    return QString();
+    bool ok = false;
+    QString v = interfaceNames().find( interface(), ok );
+    return ok ? v : QString();
 }
 
 
@@ -290,22 +303,6 @@ Module::configurationMap()
 }
 
 
-Module::Module()
-    : m_loaded( false )
-{
-}
-
-
-void
-Module::initFrom( const QVariantMap& moduleDescriptor )
-{
-    m_name = moduleDescriptor.value( "name" ).toString();
-    if ( moduleDescriptor.contains( EMERGENCY ) )
-    {
-        m_maybe_emergency = moduleDescriptor[ EMERGENCY ].toBool();
-    }
-}
-
 RequirementsList
 Module::checkRequirements()
 {
diff --git a/src/libcalamaresui/modulesystem/Module.h b/src/libcalamaresui/modulesystem/Module.h
index d6e6407d1..ec316bece 100644
--- a/src/libcalamaresui/modulesystem/Module.h
+++ b/src/libcalamaresui/modulesystem/Module.h
@@ -25,6 +25,7 @@
 #include "UiDllMacro.h"
 
 #include "modulesystem/Descriptor.h"
+#include "modulesystem/InstanceKey.h"
 
 #include <QStringList>
 #include <QVariant>
@@ -85,13 +86,13 @@ public:
      * @brief name returns the name of this module.
      * @return a string with this module's name.
      */
-    virtual QString name() const final;
+    QString name() const { return m_key.module(); }
 
     /**
      * @brief instanceId returns the instance id of this module.
      * @return a string with this module's instance id.
      */
-    virtual QString instanceId() const final;
+    QString instanceId() const { return m_key.id(); }
 
     /**
      * @brief instanceKey returns the instance key of this module.
@@ -100,49 +101,13 @@ public:
      * For instance, "partition\@partition" (default configuration) or
      * "locale\@someconfig" (custom configuration)
      */
-    virtual QString instanceKey() const final;
+    QString instanceKey() const { return m_key.toString(); }
 
     /**
      * @brief location returns the full path of this module's directory.
      * @return the path.
      */
-    virtual QString location() const final;
-
-    /**
-     * @brief type returns the Type of this module object.
-     * @return the type enum value.
-     */
-    virtual Type type() const = 0;
-
-    /**
-     * @brief typeString returns a user-visible string for the module's type.
-     * @return the type string.
-     */
-    virtual QString typeString() const;
-
-    /**
-     * @brief interface the Interface used by this module.
-     * @return the interface enum value.
-     */
-    virtual Interface interface() const = 0;
-
-    /**
-     * @brief interface returns a user-visible string for the module's interface.
-     * @return the interface string.
-     */
-    virtual QString interfaceString() const;
-
-    /**
-     * @brief isLoaded reports on the loaded status of a module.
-     * @return true if the module's loading phase has finished, otherwise false.
-     */
-    bool isLoaded() const { return m_loaded; }
-
-    /**
-     * @brief loadSelf initialized the module.
-     * Subclasses must reimplement this depending on the module type and interface.
-     */
-    virtual void loadSelf() = 0;
+    QString location() const { return m_directory; }
 
     /**
      * @brief Is this an emergency module?
@@ -156,10 +121,10 @@ public:
     bool isEmergency() const { return m_emergency; }
 
     /**
-     * @brief jobs returns any jobs exposed by this module.
-     * @return a list of jobs (can be empty).
+     * @brief isLoaded reports on the loaded status of a module.
+     * @return true if the module's loading phase has finished, otherwise false.
      */
-    virtual JobList jobs() const = 0;
+    bool isLoaded() const { return m_loaded; }
 
     /**
      * @brief configurationMap returns the contents of the configuration file for
@@ -168,6 +133,42 @@ public:
      */
     QVariantMap configurationMap();
 
+    /**
+     * @brief typeString returns a user-visible string for the module's type.
+     * @return the type string.
+     */
+    QString typeString() const;
+
+    /**
+     * @brief interface returns a user-visible string for the module's interface.
+     * @return the interface string.
+     */
+    QString interfaceString() const;
+
+    /**
+     * @brief loadSelf initialized the module.
+     * Subclasses must reimplement this depending on the module type and interface.
+     */
+    virtual void loadSelf() = 0;
+
+    /**
+     * @brief jobs returns any jobs exposed by this module.
+     * @return a list of jobs (can be empty).
+     */
+    virtual JobList jobs() const = 0;
+
+    /**
+     * @brief type returns the Type of this module object.
+     * @return the type enum value.
+     */
+    virtual Type type() const = 0;
+
+    /**
+     * @brief interface the Interface used by this module.
+     * @return the interface enum value.
+     */
+    virtual Interface interface() const = 0;
+
     /**
      * @brief Check the requirements of this module.
      */
@@ -175,7 +176,12 @@ public:
 
 protected:
     explicit Module();
-    virtual void initFrom( const QVariantMap& moduleDescriptor );
+
+    /// @brief For subclasses to read their part of the descriptor
+    virtual void initFrom( const QVariantMap& moduleDescriptor ) = 0;
+    /// @brief Generic part of descriptor reading (and instance id)
+    void initFrom( const QVariantMap& moduleDescriptor, const QString& id );
+
     QVariantMap m_configurationMap;
 
     bool m_loaded = false;
@@ -185,9 +191,8 @@ protected:
 private:
     void loadConfigurationFile( const QString& configFileName );  //throws YAML::Exception
 
-    QString m_name;
     QString m_directory;
-    QString m_instanceId;
+    ModuleSystem::InstanceKey m_key;
 };
 
 }  // namespace Calamares
diff --git a/src/libcalamaresui/modulesystem/ProcessJobModule.cpp b/src/libcalamaresui/modulesystem/ProcessJobModule.cpp
index fc4b5f254..405d9efd8 100644
--- a/src/libcalamaresui/modulesystem/ProcessJobModule.cpp
+++ b/src/libcalamaresui/modulesystem/ProcessJobModule.cpp
@@ -63,7 +63,6 @@ ProcessJobModule::jobs() const
 void
 ProcessJobModule::initFrom( const QVariantMap& moduleDescriptor )
 {
-    Module::initFrom( moduleDescriptor );
     QDir directory( location() );
     m_workingPath = directory.absolutePath();
 
diff --git a/src/libcalamaresui/modulesystem/PythonJobModule.cpp b/src/libcalamaresui/modulesystem/PythonJobModule.cpp
index 46ec1dff1..c9e90a707 100644
--- a/src/libcalamaresui/modulesystem/PythonJobModule.cpp
+++ b/src/libcalamaresui/modulesystem/PythonJobModule.cpp
@@ -64,7 +64,6 @@ PythonJobModule::jobs() const
 void
 PythonJobModule::initFrom( const QVariantMap& moduleDescriptor )
 {
-    Module::initFrom( moduleDescriptor );
     QDir directory( location() );
     m_workingPath = directory.absolutePath();
 
diff --git a/src/libcalamaresui/modulesystem/PythonQtViewModule.cpp b/src/libcalamaresui/modulesystem/PythonQtViewModule.cpp
index 08e4c5c08..b59126eaa 100644
--- a/src/libcalamaresui/modulesystem/PythonQtViewModule.cpp
+++ b/src/libcalamaresui/modulesystem/PythonQtViewModule.cpp
@@ -174,7 +174,6 @@ PythonQtViewModule::jobs() const
 void
 PythonQtViewModule::initFrom( const QVariantMap& moduleDescriptor )
 {
-    Module::initFrom( moduleDescriptor );
     QDir directory( location() );
     m_workingPath = directory.absolutePath();
 
diff --git a/src/libcalamaresui/modulesystem/ViewModule.cpp b/src/libcalamaresui/modulesystem/ViewModule.cpp
index 7506e5348..02c771ee2 100644
--- a/src/libcalamaresui/modulesystem/ViewModule.cpp
+++ b/src/libcalamaresui/modulesystem/ViewModule.cpp
@@ -91,7 +91,6 @@ ViewModule::jobs() const
 void
 ViewModule::initFrom( const QVariantMap& moduleDescriptor )
 {
-    Module::initFrom( moduleDescriptor );
     QDir directory( location() );
     QString load;
     if ( !moduleDescriptor.value( "load" ).toString().isEmpty() )