diff --git a/src/org/kar/archidata/dataAccess/options/CheckJPA.java b/src/org/kar/archidata/dataAccess/options/CheckJPA.java
index 5363175..a5c7dc3 100644
--- a/src/org/kar/archidata/dataAccess/options/CheckJPA.java
+++ b/src/org/kar/archidata/dataAccess/options/CheckJPA.java
@@ -465,6 +465,22 @@ public class CheckJPA<T> implements CheckFunctionInterface {
 				} else if (type.isEnum()) {
 					// nothing to do.
 				}
+				final DataJson dataJson = AnnotationTools.getDataJson(field);
+				if (dataJson != null && dataJson.checker() != null) {
+					final CheckFunctionInterface checkerInstance = dataJson.checker().getDeclaredConstructor()
+							.newInstance();
+					add(fieldName,
+							(
+									final DBAccess ioDb,
+									final String baseName,
+									final T data,
+									final List<String> modifiedValue,
+									final QueryOptions options) -> {
+								// get the field of the specific element
+								final Object tmpData = field.get(data);
+								checkerInstance.check(ioDb, baseName, tmpData, null, options);
+							});
+				}
 				// keep this is last ==> take more time...
 				if (AnnotationTools.isUnique(field)) {
 					// Create the request ...
@@ -498,13 +514,21 @@ public class CheckJPA<T> implements CheckFunctionInterface {
 		}
 	}
 
+	public void check(final Object data) throws Exception {
+		check(null, "", data, null, null);
+	}
+
+	public void check(final String baseName, final Object data) throws Exception {
+		check(null, baseName, data, null, null);
+	}
+
 	public void check(final DBAccess ioDb, final String baseName, final Object data) throws Exception {
 		check(ioDb, baseName, data, null, null);
 	}
 
-	public void check(final DBAccess ioDb, final String baseName, final Object data, final List<String> filterValue)
+	public void check(final DBAccess ioDb, final String baseName, final Object data, final List<String> modifiedValue)
 			throws Exception {
-		check(ioDb, baseName, data, filterValue, null);
+		check(ioDb, baseName, data, modifiedValue, null);
 	}
 
 	@Override
@@ -512,11 +536,14 @@ public class CheckJPA<T> implements CheckFunctionInterface {
 			final DBAccess ioDb,
 			final String baseName,
 			final Object data,
-			final List<String> modifiedValue,
+			List<String> modifiedValue,
 			final QueryOptions options) throws Exception {
 		if (this.checking == null) {
 			initialize();
 		}
+		if (modifiedValue == null) {
+			modifiedValue = AnnotationTools.getAllFieldsNames(this.clazz);
+		}
 		if (!(this.clazz.isAssignableFrom(data.getClass()))) {
 			throw new DataAccessException("Incompatatyble type of Object" + data.getClass().getCanonicalName());
 		}
diff --git a/test/src/test/kar/archidata/dataAccess/TestDataJson.java b/test/src/test/kar/archidata/dataAccess/TestDataJson.java
new file mode 100644
index 0000000..bb6750a
--- /dev/null
+++ b/test/src/test/kar/archidata/dataAccess/TestDataJson.java
@@ -0,0 +1,44 @@
+package test.kar.archidata.dataAccess;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.kar.archidata.exception.InputException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import test.kar.archidata.StepwiseExtension;
+import test.kar.archidata.dataAccess.model.DataInJson;
+import test.kar.archidata.dataAccess.model.DataWithSubJson;
+import test.kar.archidata.dataAccess.model.DataWithSubJson.DataWithSubJsonChecker;
+
+@ExtendWith(StepwiseExtension.class)
+public class TestDataJson {
+	final static private Logger LOGGER = LoggerFactory.getLogger(TestDataJson.class);
+
+	@Test
+	public void testCheckerDoesNotThrow() throws Exception {
+		final DataWithSubJson data = new DataWithSubJson();
+		data.dataSerialized = new DataInJson();
+		data.dataSerialized.data = "65454";
+		final DataWithSubJsonChecker checker = new DataWithSubJsonChecker();
+		Assertions.assertDoesNotThrow(() -> {
+			checker.check(null, "", data);
+		});
+	}
+
+	@Test
+	public void testCheckerDoesThrow() throws Exception {
+		final DataWithSubJson data = new DataWithSubJson();
+		data.dataSerialized = new DataInJson();
+		data.dataSerialized.data = "lqksjdflkjqsdf";
+		final DataWithSubJsonChecker checker = new DataWithSubJsonChecker();
+		final InputException res = Assertions.assertThrows(InputException.class, () -> {
+			checker.check(null, "", data);
+		});
+		Assertions.assertEquals(res.getMessage(),
+				"does not match the required pattern (constraints) must be '^[0-9]+$'");
+
+	}
+
+}
diff --git a/test/src/test/kar/archidata/dataAccess/model/DataInJson.java b/test/src/test/kar/archidata/dataAccess/model/DataInJson.java
new file mode 100644
index 0000000..f300452
--- /dev/null
+++ b/test/src/test/kar/archidata/dataAccess/model/DataInJson.java
@@ -0,0 +1,20 @@
+package test.kar.archidata.dataAccess.model;
+
+import org.kar.archidata.dataAccess.options.CheckJPA;
+
+import jakarta.validation.constraints.Pattern;
+import jakarta.validation.constraints.Size;
+
+public class DataInJson {
+	// Simple checker declaration
+	public static class DataInJsonChecker extends CheckJPA<DataInJson> {
+		public DataInJsonChecker() {
+			super(DataInJson.class);
+		}
+	}
+
+	// Simple data to verify if the checker is active
+	@Size(min = 3, max = 128)
+	@Pattern(regexp = "^[0-9]+$")
+	public String data;
+}
diff --git a/test/src/test/kar/archidata/dataAccess/model/DataWithSubJson.java b/test/src/test/kar/archidata/dataAccess/model/DataWithSubJson.java
new file mode 100644
index 0000000..95b7070
--- /dev/null
+++ b/test/src/test/kar/archidata/dataAccess/model/DataWithSubJson.java
@@ -0,0 +1,16 @@
+package test.kar.archidata.dataAccess.model;
+
+import org.kar.archidata.annotation.DataJson;
+import org.kar.archidata.dataAccess.options.CheckJPA;
+
+public class DataWithSubJson {
+	// Simple checker declaration
+	public static class DataWithSubJsonChecker extends CheckJPA<DataWithSubJson> {
+		public DataWithSubJsonChecker() {
+			super(DataWithSubJson.class);
+		}
+	}
+
+	@DataJson(checker = DataInJson.DataInJsonChecker.class)
+	public DataInJson dataSerialized;
+}