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diff --git a/src/core/scope.h b/src/core/scope.h
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+/*:*
+ *: File: ./src/core/scope.h
+ *: A simple interpreter
+ *: 
+ *: WWW		: http://fype.buetow.org
+ *: AUTHOR	: http://paul.buetow.org
+ *: E-Mail	: fype at dev.buetow.org
+ *: 
+ *: Copyright (c) 2005 - 2008, Paul Buetow 
+ *: All rights reserved.
+ *: 
+ *: Redistribution and use in source and binary forms, with or without modi-
+ *: fication, are permitted provided that the following conditions are met:
+ *:  * Redistributions of source code must retain the above copyright
+ *:    notice, this list of conditions and the following disclaimer.
+ *:  * Redistributions in binary form must reproduce the above copyright
+ *:    notice, this list of conditions and the following disclaimer in the
+ *:    documentation and/or other materials provided with the distribution.
+ *:  * Neither the name of P. B. Labs nor the names of its contributors may 
+ *:    be used to endorse or promote products derived from this software 
+ *:    without specific prior written permission.
+ *: 
+ *: THIS SOFTWARE IS PROVIDED BY PAUL C. BUETOW AS IS'' AND ANY EXPRESS OR 
+ *: IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
+ *: WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *: DISCLAIMED. IN NO EVENT SHALL PAUL C. BUETOW BE LIABLE FOR ANY DIRECT, 
+ *: INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
+ *: (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
+ *:  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ *: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ *: STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ *: IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
+ *: POSSIBILITY OF SUCH DAMAGE.
+ *:*/
+
+#ifndef SCOPE_H
+#define SCOPE_H
+
+#include "../data/hash.h"
+#include "../data/stack.h"
+#include "../defines.h"
+#include "symbol.h"
+
+typedef struct {
+   Hash *p_hash_global;
+   Stack *p_stack_scopes;
+} Scope;
+
+Scope* scope_new(Hash *p_hash_syms);
+void scope_delete(Scope *p_scope);
+Symbol *scope_get(Scope *p_scope, char *c_key);
+Symbol *scope_remove(Scope *p_scope, char *c_key);
+_Bool scope_exists(Scope *p_scope, char *c_key);
+_Bool scope_newset(Scope *p_scope, char *c_key, Symbol *p_symbol);
+_Bool scope_reset(Scope *p_scope, char *c_key, Symbol *p_symbol);
+void scope_down(Scope *p_scope);
+void scope_up(Scope *p_scope);
+void scope_print(Scope *p_scope);
+
+#endif /* SCOPE_H */