diff --git a/include/base.h b/include/base.h
index 4302918..eec6641 100644
--- a/include/base.h
+++ b/include/base.h
@@ -62,3 +62,13 @@ struct arrow_t {
     uint y;
     uint z;
 };
+
+struct model_t {
+    int id;
+}
+
+struct scheduler_t
+{
+    int id;
+    struct model_t *models;
+};
diff --git a/include/model.h b/include/model.h
index 372387a..a991392 100644
--- a/include/model.h
+++ b/include/model.h
@@ -48,6 +48,17 @@
 
 /* -------------------------------------------------------------------------- */
 
+bool model_init(const char *content, size_t length, const char *basename);
+bool model_shutdown(void);
+
+char model_get_dim(void);
+long model_get_dim_value(const char *axis);
+char model_get_multiplicity(void);
+bool model_get_next_state(char *new_state_id);
+bool model_get_next_arrow(struct arrow_t *new_arrow,
+                          const char *state_id,
+                          char dimension);
+
 // -------------------------------------------------------------------------- //
 // Model init function (and model discovery)                                  //
 // -------------------------------------------------------------------------- //
diff --git a/include/scheduler.h b/include/scheduler.h
index 449a5e8..1a4b057 100644
--- a/include/scheduler.h
+++ b/include/scheduler.h
@@ -32,7 +32,7 @@
 // -------------------------------------------------------------------------- //
 // Scheduler init function                                                    //
 // -------------------------------------------------------------------------- //
-//void sched_init(scheduler_t *scheduler);
+void sched_init(struct scheduler_t *scheduler);
 
 // -------------------------------------------------------------------------- //
 // Scheduler content destructor function                                      //