diff --git a/core/src/main/kotlin/eu/iamgio/quarkdown/function/value/ValueFactory.kt b/core/src/main/kotlin/eu/iamgio/quarkdown/function/value/ValueFactory.kt
index 94ab5db2..bdfc83d2 100644
--- a/core/src/main/kotlin/eu/iamgio/quarkdown/function/value/ValueFactory.kt
+++ b/core/src/main/kotlin/eu/iamgio/quarkdown/function/value/ValueFactory.kt
@@ -241,43 +241,6 @@ object ValueFactory {
             expandFunctionCalls = true,
         ).asInline()
 
-    /**
-     * Evaluates an expression from a raw string input.
-     * @param raw string input that may contain both static values and function calls (e.g. `"2 + 2 is .sum {2} {2}"`)
-     * @param context context to retrieve the pipeline from
-     * @return the expression (in the previous example: `ComposedExpression(DynamicValue("2 + 2 is "), FunctionCall(sum, 2, 2))`)
-     */
-    fun expression(
-        raw: String,
-        context: Context,
-    ): Expression? {
-        // The content of the argument is tokenized to distinguish static values (string/number/...)
-        // from nested function calls, which are also expressions.
-        val components =
-            this.markdown(
-                lexer = context.flavor.lexerFactory.newExpressionLexer(raw, allowBlockFunctionCalls = true),
-                context,
-                expandFunctionCalls = false,
-            ).unwrappedValue.children
-
-        if (components.isEmpty()) return null
-
-        /**
-         * @param node to convert
-         * @return an expression that matches the node type
-         */
-        fun nodeToExpression(node: Node): Expression =
-            when (node) {
-                is PlainTextNode -> DynamicValue(node.text) // The actual type is determined later.
-                is FunctionCallNode -> context.resolveUnchecked(node) // Function existance is checked later.
-
-                else -> throw IllegalArgumentException("Unexpected node $node in expression $raw")
-            }
-
-        // Nodes are mapped to expressions.
-        return ComposedExpression(expressions = components.map(::nodeToExpression))
-    }
-
     /**
      * @param raw string input to parse the expression from
      * @param context context to retrieve the pipeline from
@@ -344,6 +307,43 @@ object ValueFactory {
         )
     }
 
+    /**
+     * Evaluates an expression from a raw string input.
+     * @param raw string input that may contain both static values and function calls (e.g. `"2 + 2 is .sum {2} {2}"`)
+     * @param context context to retrieve the pipeline from
+     * @return the expression (in the previous example: `ComposedExpression(DynamicValue("2 + 2 is "), FunctionCall(sum, 2, 2))`)
+     */
+    fun expression(
+        raw: String,
+        context: Context,
+    ): Expression? {
+        // The content of the argument is tokenized to distinguish static values (string/number/...)
+        // from nested function calls, which are also expressions.
+        val components =
+            this.markdown(
+                lexer = context.flavor.lexerFactory.newExpressionLexer(raw, allowBlockFunctionCalls = true),
+                context,
+                expandFunctionCalls = false,
+            ).unwrappedValue.children
+
+        if (components.isEmpty()) return null
+
+        /**
+         * @param node to convert
+         * @return an expression that matches the node type
+         */
+        fun nodeToExpression(node: Node): Expression =
+            when (node) {
+                is PlainTextNode -> DynamicValue(node.text) // The actual type is determined later.
+                is FunctionCallNode -> context.resolveUnchecked(node) // Function existance is checked later.
+
+                else -> throw IllegalArgumentException("Unexpected node $node in expression $raw")
+            }
+
+        // Nodes are mapped to expressions.
+        return ComposedExpression(expressions = components.map(::nodeToExpression))
+    }
+
     /**
      * Evaluates an expression from a raw string input.
      * @param raw string input that may contain both static values and function calls (e.g. `"2 + 2 is .sum {2} {2}"`)
diff --git a/stdlib/src/main/kotlin/eu/iamgio/quarkdown/stdlib/Ecosystem.kt b/stdlib/src/main/kotlin/eu/iamgio/quarkdown/stdlib/Ecosystem.kt
index ca9b0e8e..84fc4245 100644
--- a/stdlib/src/main/kotlin/eu/iamgio/quarkdown/stdlib/Ecosystem.kt
+++ b/stdlib/src/main/kotlin/eu/iamgio/quarkdown/stdlib/Ecosystem.kt
@@ -2,7 +2,6 @@ package eu.iamgio.quarkdown.stdlib
 
 import eu.iamgio.quarkdown.context.Context
 import eu.iamgio.quarkdown.function.error.FunctionRuntimeException
-import eu.iamgio.quarkdown.function.expression.eval
 import eu.iamgio.quarkdown.function.reflect.Injected
 import eu.iamgio.quarkdown.function.value.OutputValue
 import eu.iamgio.quarkdown.function.value.ValueFactory
@@ -36,14 +35,5 @@ fun include(
     // Evaluate the Quarkdown source.
     // This automatically converts the source into a value (e.g. a node, a string, a number, etc.)
     // and fills the current context with new declarations (e.g. variables, functions, link definitions, etc.)
-    val result =
-        ValueFactory.expression(raw, context)?.eval()
-            ?: throw FunctionRuntimeException("Cannot include sub-file $file: the Quarkdown source could not be evaluated")
-
-    // The value must be an output value in order to comply with the function rules.
-    return result as? OutputValue<*>
-        ?: throw FunctionRuntimeException(
-            "Cannot include sub-file $file: the evaluation of the Quarkdown source is not a suitable output value " +
-                "(${result::class.simpleName} found)",
-        )
+    return ValueFactory.eval(raw, context)
 }