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diff --git a/src/query.h b/src/query.h
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+// Copyright 2012-2024 David Robillard <d@drobilla.net>
+// SPDX-License-Identifier: ISC
+
+#ifndef JALV_MODEL_H
+#define JALV_MODEL_H
+
+#include "attributes.h"
+#include "nodes.h"
+
+#include "lilv/lilv.h"
+
+#include <stdbool.h>
+
+// Lilv query utilities
+JALV_BEGIN_DECLS
+
+/// Return whether a port has a given designation
+bool
+jalv_port_has_designation(const JalvNodes*  nodes,
+                          const LilvPlugin* plugin,
+                          const LilvPort*   port,
+                          const LilvNode*   designation);
+
+/// Return whether a UI is described as resizable
+bool
+jalv_ui_is_resizable(LilvWorld* world, const LilvUI* ui);
+
+JALV_END_DECLS
+
+#endif // JALV_MODEL_H