1 files changed, 13 insertions, 0 deletions
diff --git a/src/writer.c b/src/writer.c
index 445362b4..d56f8156 100644
--- a/src/writer.c
+++ b/src/writer.c
@@ -14,7 +14,12 @@
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
+#include "byte_sink.h"
+#include "node.h"
 #include "serd_internal.h"
+#include "stack.h"
+#include "string_utils.h"
+#include "uri_utils.h"
 
 #include "serd/serd.h"
 
@@ -32,6 +37,14 @@ typedef struct {
 	SerdNode* predicate;
 } WriteContext;
 
+typedef enum {
+	FIELD_NONE,
+	FIELD_SUBJECT,
+	FIELD_PREDICATE,
+	FIELD_OBJECT,
+	FIELD_GRAPH
+} Field;
+
 static const WriteContext WRITE_CONTEXT_NULL = { NULL, NULL, NULL };
 
 typedef enum {