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diff --git a/sca-cpp/trunk/modules/server/mod-scm.hpp b/sca-cpp/trunk/modules/server/mod-scm.hpp
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+++ b/sca-cpp/trunk/modules/server/mod-scm.hpp
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ */
+
+/* $Rev$ $Date$ */
+
+#ifndef tuscany_modscm_hpp
+#define tuscany_modscm_hpp
+
+/**
+ * Evaluation functions used by mod-eval to evaluate implementation.scheme
+ * component implementations.
+ */
+
+#include <string>
+#include <iostream>
+#include <fstream>
+
+#include "function.hpp"
+#include "list.hpp"
+#include "value.hpp"
+#include "monad.hpp"
+#include "cache.hpp"
+#include "../eval/driver.hpp"
+#include "../http/httpd.hpp"
+#include "mod-eval.hpp"
+
+namespace tuscany {
+namespace server {
+namespace modeval {
+namespace scm {
+
+/**
+ * Evaluate a script component implementation function.
+ */
+struct evalImplementation {
+    const value impl;
+    evalImplementation(const value& impl) : impl(impl) {
+    }
+    const failable<value, std::string> operator()(const value& func, const list<value>& params) const {
+        const value expr = cons<value>(func, eval::quotedParameters(params));
+        httpd::logValue(expr, "expr");
+        gc_pool pool;
+        eval::Env globalEnv = eval::setupEnvironment(pool);
+        const value val = eval::evalScript(expr, impl, globalEnv, pool);
+        httpd::logValue(val, "val");
+        if (isNil(val))
+            return mkfailure<value, std::string>("Could not evaluate expression");
+        return val;
+    }
+};
+
+/**
+ * Read a script component implementation.
+ */
+const failable<ilambda, std::string> readLatestImplementation(const std::string path) {
+    std::ifstream is(path.c_str(), std::ios_base::in);
+    if (is.fail() || is.bad())
+        return mkfailure<ilambda, std::string>("Could not read implementation: " + path);
+    const value impl = eval::readScript(is);
+    if (isNil(impl))
+        return mkfailure<ilambda, std::string>("Could not read implementation: " + path);
+    return ilambda(evalImplementation(impl));
+}
+
+const cached<failable<ilambda, std::string> > readImplementation(const std::string& path) {
+    const lambda<failable<ilambda, std::string>(std::string)> ri(readLatestImplementation);
+    const lambda<unsigned long(std::string)> ft(latestFileTime);
+    return cached<failable<ilambda, std::string> >(curry(ri, path), curry(ft, path));
+}
+
+}
+}
+}
+}
+
+#endif /* tuscany_modscm_hpp */