diff --git a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Assertion.java b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Assertion.java
index 2c50b67..205240f 100644
--- a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Assertion.java
+++ b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Assertion.java
@@ -5,11 +5,13 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
+import java.util.function.Function;
 
 import org.oneedtech.inspect.schema.Catalog;
 import org.oneedtech.inspect.schema.SchemaKey;
 import org.oneedtech.inspect.util.resource.Resource;
 import org.oneedtech.inspect.vc.util.JsonNodeUtil;
+import org.oneedtech.inspect.vc.util.PrimitiveValueValidator;
 
 import com.fasterxml.jackson.databind.JsonNode;
 import com.google.common.base.MoreObjects;
@@ -125,23 +127,33 @@ public class Assertion extends Credential {
 	}
 
     public enum ValueType {
-        BOOLEAN,
-        COMPACT_IRI,
-        DATA_URI,
-        DATA_URI_OR_URL,
-        DATETIME,
-        EMAIL,
-        ID,
-        IDENTITY_HASH,
-        IRI,
-        LANGUAGE,
-        MARKDOWN_TEXT,
-        RDF_TYPE,
-        TELEPHONE,
-        TEXT,
-        TEXT_OR_NUMBER,
-        URL,
-        URL_AUTHORITY;
+        BOOLEAN(PrimitiveValueValidator::validateBoolean),
+        COMPACT_IRI(PrimitiveValueValidator::validateCompactIri),
+        DATA_URI(PrimitiveValueValidator::validateDataUri),
+        DATA_URI_OR_URL(PrimitiveValueValidator::validateDataUriOrUrl),
+        DATETIME(PrimitiveValueValidator::validateDatetime),
+        EMAIL(PrimitiveValueValidator::validateEmail),
+        ID(null),
+        IDENTITY_HASH(PrimitiveValueValidator::validateIdentityHash),
+        IRI(PrimitiveValueValidator::validateIri),
+        LANGUAGE(PrimitiveValueValidator::validateLanguage),
+        MARKDOWN_TEXT(PrimitiveValueValidator::validateMarkdown),
+        RDF_TYPE(PrimitiveValueValidator::validateRdfType),
+        TELEPHONE(PrimitiveValueValidator::validateTelephone),
+        TEXT(PrimitiveValueValidator::validateText),
+        TEXT_OR_NUMBER(PrimitiveValueValidator::validateTextOrNumber),
+        URL(PrimitiveValueValidator::validateUrl),
+        URL_AUTHORITY(PrimitiveValueValidator::validateUrlAuthority);
+
+        private final Function<JsonNode, Boolean> validationFunction;
+
+        private ValueType(Function<JsonNode, Boolean> validationFunction) {
+            this.validationFunction = validationFunction;
+        }
+
+        public Function<JsonNode, Boolean> getValidationFunction() {
+            return validationFunction;
+        }
 
         public static List<ValueType> primitives = List.of(BOOLEAN, DATA_URI_OR_URL, DATETIME, ID, IDENTITY_HASH, IRI, LANGUAGE, MARKDOWN_TEXT,
         TELEPHONE, TEXT, TEXT_OR_NUMBER, URL, URL_AUTHORITY);
diff --git a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/OB20Inspector.java b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/OB20Inspector.java
index 0f6c636..bf1eb24 100644
--- a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/OB20Inspector.java
+++ b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/OB20Inspector.java
@@ -21,7 +21,6 @@ import org.oneedtech.inspect.util.json.ObjectMapperCache;
 import org.oneedtech.inspect.util.resource.Resource;
 import org.oneedtech.inspect.util.resource.ResourceType;
 import org.oneedtech.inspect.util.spec.Specification;
-import org.oneedtech.inspect.vc.Assertion.Type;
 import org.oneedtech.inspect.vc.Credential.CredentialEnum;
 import org.oneedtech.inspect.vc.jsonld.JsonLdGeneratedObject;
 import org.oneedtech.inspect.vc.jsonld.probe.JsonLDCompactionProve;
@@ -31,6 +30,7 @@ import org.oneedtech.inspect.vc.payload.SvgParser;
 import org.oneedtech.inspect.vc.probe.ContextPropertyProbe;
 import org.oneedtech.inspect.vc.probe.CredentialParseProbe;
 import org.oneedtech.inspect.vc.probe.TypePropertyProbe;
+import org.oneedtech.inspect.vc.probe.ValidationPropertyProbe;
 import org.oneedtech.inspect.vc.util.CachingDocumentLoader;
 
 import com.fasterxml.jackson.databind.JsonNode;
@@ -116,6 +116,21 @@ public class OB20Inspector extends Inspector {
 			accumulator.add(new JsonLDValidationProbe(jsonLdGeneratedObject).run(assertion, ctx));
 			if(broken(accumulator, true)) return abort(ctx, accumulator, probeCount);
 
+			// Validates the Open Badge
+			List<Validation> validations = assertion.getValidations();
+			for (Validation validation : validations) {
+				probeCount++;
+				accumulator.add(new ValidationPropertyProbe(validation).run(assertion.getJson(), ctx));
+				if(broken(accumulator)) return abort(ctx, accumulator, probeCount);
+			}
+
+			// Each Badge Object contains all required properties for its class
+			// This could be done validating with the schema, but seems that there are some error on that file
+			// So, we do a manual Probe for the nodes
+
+			// accumulator.add(new RequiredFieldsProbe(jsonLdGeneratedObject).run(assertion, ctx));
+			// if(broken(accumulator, true)) return abort(ctx, accumulator, probeCount);
+
 			//canonical schema and inline schemata
 			// SchemaKey schema = assertion.getSchemaKey().orElseThrow();
 			// for(Probe<JsonNode> probe : List.of(new JsonSchemaProbe(schema), new InlineJsonSchemaProbe(schema))) {
diff --git a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Validation.java b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Validation.java
index 509665b..8ecd22c 100644
--- a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Validation.java
+++ b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Validation.java
@@ -36,6 +36,55 @@ public class Validation {
         this.fullValidate = builder.fullValidate;
     }
 
+
+    public String getName() {
+        return name;
+    }
+
+    public Assertion.ValueType getType() {
+        return type;
+    }
+
+    public boolean isRequired() {
+        return required;
+    }
+
+    public boolean isMany() {
+        return many;
+    }
+
+    public List<String> getMustContainOne() {
+        return mustContainOne;
+    }
+
+    public List<String> getPrerequisites() {
+        return prerequisites;
+    }
+
+    public List<Assertion.Type> getExpectedTypes() {
+        return expectedTypes;
+    }
+
+    public boolean isAllowRemoteUrl() {
+        return allowRemoteUrl;
+    }
+
+    public boolean isAllowDataUri() {
+        return allowDataUri;
+    }
+
+    public boolean isFetch() {
+        return fetch;
+    }
+
+    public String getDefaultType() {
+        return defaultType;
+    }
+
+    public boolean isFullValidate() {
+        return fullValidate;
+    }
+
     public static class Builder {
         private String name;
         private Assertion.ValueType type;
diff --git a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/probe/ValidationPropertyProbe.java b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/probe/ValidationPropertyProbe.java
new file mode 100644
index 0000000..a64b0aa
--- /dev/null
+++ b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/probe/ValidationPropertyProbe.java
@@ -0,0 +1,135 @@
+package org.oneedtech.inspect.vc.probe;
+
+import java.util.List;
+import java.util.function.Function;
+
+import org.oneedtech.inspect.core.probe.RunContext;
+import org.oneedtech.inspect.core.report.ReportItems;
+import org.oneedtech.inspect.vc.Validation;
+import org.oneedtech.inspect.vc.Assertion.ValueType;
+import org.oneedtech.inspect.vc.util.JsonNodeUtil;
+
+import com.fasterxml.jackson.databind.JsonNode;
+
+
+public class ValidationPropertyProbe extends PropertyProbe {
+    private final Validation validation;
+
+    public ValidationPropertyProbe(Validation validation) {
+        super(ID + "<" + validation.getName() + ">", validation.getName());
+        this.validation = validation;
+        setValidations(this::validate);
+    }
+
+
+    @Override
+    protected ReportItems reportForNonExistentProperty(JsonNode node, RunContext ctx) {
+        if (validation.isRequired()) {
+            return error("Required property " + validation.getName() + " not present in " + node.toPrettyString(), ctx);
+        } else {
+            // optional property
+            return success(ctx);
+        }
+    }
+
+    /**
+     *  Validates presence and data type of a single property that is
+     * expected to be one of the Open Badges Primitive data types or an ID.
+     * @param node node to check data type
+     * @param ctx associated run context
+     * @return validation result
+     */
+    private ReportItems validate(JsonNode node, RunContext ctx) {
+        // required property
+        if (validation.isRequired()) {
+            if (node.isObject()) {
+                if (!node.fieldNames().hasNext()) {
+                   return error("Required property " + validation.getName() + " value " + node.toString() + " is not acceptable", ctx);
+                }
+            } else {
+                List<String> values = JsonNodeUtil.asStringList(node);
+                if (values == null ||values.isEmpty()) {
+                    return error("Required property " + validation.getName() + " value " + values + " is not acceptable", ctx);
+                }
+            }
+        }
+
+        List<JsonNode> nodeList = JsonNodeUtil.asNodeList(node);
+        // many property
+        if (!validation.isMany()) {
+            if (nodeList.size() > 1) {
+                return error("Property " + validation.getName() + "has more than the single allowed value.", ctx);
+            }
+        }
+
+        try {
+            if (validation.getType() != ValueType.ID) {
+                Function<JsonNode, Boolean> validationFunction = validation.getType().getValidationFunction();
+                for (JsonNode childNode : nodeList) {
+                    Boolean valid = validationFunction.apply(childNode);
+                    if (!valid) {
+                        return error(validation.getType() + " property " + validation.getName() + " value " + childNode.toString() + " not valid", ctx);
+                    }
+                }
+            } else {
+                /**
+                for i in range(len(values_to_test)):
+                val = values_to_test[i]
+                if isinstance(prop_value, (list, tuple,)):
+                    value_to_test_path = [node_id, prop_name, i]
+                else:
+                    value_to_test_path = [node_id, prop_name]
+
+                if isinstance(val, dict):
+                    actions.append(
+                        add_task(VALIDATE_EXPECTED_NODE_CLASS, node_path=value_to_test_path,
+                                 expected_class=task_meta.get('expected_class'),
+                                 full_validate=task_meta.get('full_validate', True)))
+                    continue
+                elif task_meta.get('allow_data_uri') and not PrimitiveValueValidator(ValueTypes.DATA_URI_OR_URL)(val):
+                    raise ValidationError("ID-type property {} had value `{}` that isn't URI or DATA URI in {}.".format(
+                        prop_name, abv(val), abv_node(node_id, node_path))
+                    )
+                elif not task_meta.get('allow_data_uri', False) and not PrimitiveValueValidator(ValueTypes.IRI)(val):
+                    actions.append(report_message(
+                        "ID-type property {} had value `{}` where another scheme may have been expected {}.".format(
+                            prop_name, abv(val), abv_node(node_id, node_path)
+                        ), message_level=MESSAGE_LEVEL_WARNING))
+                    raise ValidationError(
+                        "ID-type property {} had value `{}` not embedded node or in IRI format in {}.".format(
+                            prop_name, abv(val), abv_node(node_id, node_path))
+                    )
+                try:
+                    target = get_node_by_id(state, val)
+                except IndexError:
+                    if not task_meta.get('fetch', False):
+                        if task_meta.get('allow_remote_url') and PrimitiveValueValidator(ValueTypes.URL)(val):
+                            continue
+                        if task_meta.get('allow_data_uri') and PrimitiveValueValidator(ValueTypes.DATA_URI)(val):
+                            continue
+                        raise ValidationError(
+                            'Node {} has {} property value `{}` that appears not to be in URI format'.format(
+                                abv_node(node_id, node_path), prop_name, abv(val)
+                            ) + ' or did not correspond to a known local node.')
+                    else:
+                        actions.append(
+                            add_task(FETCH_HTTP_NODE, url=val,
+                                     expected_class=task_meta.get('expected_class'),
+                                     source_node_path=value_to_test_path
+                                     ))
+                else:
+                    actions.append(
+                        add_task(VALIDATE_EXPECTED_NODE_CLASS, node_id=val,
+                                 expected_class=task_meta.get('expected_class')))
+                 */
+            }
+        } catch (Throwable t) {
+            return fatal(t.getMessage(), ctx);
+        }
+
+        return success(ctx);
+    }
+
+    public static final String ID = ValidationPropertyProbe.class.getSimpleName();
+
+}
diff --git a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/util/PrimitiveValueValidator.java b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/util/PrimitiveValueValidator.java
new file mode 100644
index 0000000..0e81463
--- /dev/null
+++ b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/util/PrimitiveValueValidator.java
@@ -0,0 +1,173 @@
+package org.oneedtech.inspect.vc.util;
+
+import java.io.IOException;
+import java.io.StringReader;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.time.format.DateTimeFormatter;
+import java.time.format.DateTimeParseException;
+import java.util.IllformedLocaleException;
+import java.util.List;
+import java.util.Locale;
+
+import org.oneedtech.inspect.core.probe.json.JsonPathEvaluator;
+
+import com.apicatalog.jsonld.JsonLd;
+import com.apicatalog.jsonld.JsonLdError;
+import com.apicatalog.jsonld.document.JsonDocument;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.ObjectReader;
+import com.google.common.io.Resources;
+
+import jakarta.json.JsonArray;
+import jakarta.json.JsonObject;
+
+/**
+ * Validator for ValueType. Translated into java from PrimitiveValueValidator in validation.py
+ */
+public class PrimitiveValueValidator {
+
+    public static boolean validateBoolean(JsonNode value) {
+        return value.isValueNode() && value.isBoolean();
+    }
+
+    public static boolean validateCompactIri(JsonNode value) {
+        if (value.asText().equals("id") || validateIri(value)) {
+            return true;
+        }
+
+        return false;
+    }
+
+    public static boolean validateDataUri(JsonNode value) {
+        try {
+            URI uri = new URI(value.asText());
+            return "data".equalsIgnoreCase(uri.getScheme());
+        } catch (Throwable ignored) {
+        }
+        return false;
+    }
+
+    public static boolean validateDataUriOrUrl(JsonNode value) {
+        return validateUrl(value) || validateDataUri(value);
+    }
+
+    public static boolean validateDatetime(JsonNode value) {
+        try {
+            DateTimeFormatter.ISO_INSTANT.parse(value.asText());
+            return true;
+        } catch (DateTimeParseException | NullPointerException ignored) {
+        }
+        return false;
+    }
+
+    public static boolean validateEmail(JsonNode value) {
+        return value.asText().matches("(^[^@\\s]+@[^@\\s]+$)");
+    }
+
+    public static boolean is_hashed_identity_hash(JsonNode value) {
+        return value.asText().matches("md5\\$[\\da-fA-F]{32}$") || value.asText().matches("sha256\\$[\\da-fA-F]{64}$");
+    }
+
+    /**
+     * Validates that identity is a string. More specific rules may only be enforced at the class instance level.
+     * @param value
+     * @return
+     */
+    public static boolean validateIdentityHash(JsonNode value) {
+        return validateText(value);
+    }
+
+    /**
+     * Checks if a string matches an acceptable IRI format and scheme. For now, only accepts a few schemes,
+     * 'http', 'https', blank node identifiers, and 'urn:uuid'
+
+     * @return
+     */
+    public static boolean validateIri(JsonNode value) {
+        return validateUrl(value) || value.asText().matches("^_:") || value.asText().matches("^urn:uuid:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$");
+    }
+
+    public static boolean validateLanguage(JsonNode value) {
+        try {
+            return validateText(value) && new Locale.Builder().setLanguageTag(value.asText()).build() != null;
+        } catch (IllformedLocaleException ignored) {
+            // value is not a valid locale
+        }
+        return false;
+    }
+
+    public static boolean validateMarkdown(JsonNode value) {
+        return validateText(value);
+    }
+
+    public static boolean validateRdfType(JsonNode value) {
+        if (!validateText(value)) {
+            return false;
+        }
+
+        ObjectMapper mapper = new ObjectMapper(); // TODO: get from RunContext
+        JsonPathEvaluator jsonPath = new JsonPathEvaluator(mapper);
+
+        try {
+            JsonNode node = mapper.readTree(Resources.getResource("contexts/ob-v2p0.json"));
+            ObjectReader readerForUpdating = mapper.readerForUpdating(node);
+            JsonNode merged = readerForUpdating.readValue("{\"type\": \"" + value.asText() + "\"}");
+
+            JsonDocument jsonDocument = JsonDocument.of(new StringReader(merged.toString()));
+            JsonNode expanded = mapper.readTree(JsonLd.expand(jsonDocument).get().toString());
+
+            return validateIri(JsonNodeUtil.asNodeList(expanded, "$[0].@type[0]", jsonPath).get(0));
+
+        } catch (NullPointerException | IOException | JsonLdError e) {
+            return false;
+        }
+    }
+
+    public static boolean validateTelephone(JsonNode value) {
+        return value.asText().matches("^\\+?[1-9]\\d{1,14}(;ext=\\d+)?$");
+    }
+
+    public static boolean validateText(JsonNode value) {
+        return value.isValueNode() && value.isTextual();
+    }
+
+    public static boolean validateTextOrNumber(JsonNode value) {
+        return value.isValueNode() && value.isTextual() || value.isNumber();
+    }
+
+    public static boolean validateUrl(JsonNode value) {
+        if (!value.isValueNode()) {
+            return false;
+        }
+
+        try {
+            new URL(value.asText());
+            return true;
+        } catch (MalformedURLException ignored) {
+            // value is not a valid URL
+        }
+        return false;
+    }
+
+    public static boolean validateUrlAuthority(JsonNode value) {
+        if (!validateText(value)) {
+            return false;
+        }
+
+        URI testUri;
+        try {
+            testUri = new URI("http://" + value.asText() + "/test");
+            String host = testUri.getHost();
+            if (host == null || !host.matches("(?=^.{4,253}$)(^((?!-)[a-zA-Z0-9-]{0,62}[a-zA-Z0-9]\\.)+[a-zA-Z]{2,63}$)")) {
+                return false;
+            }
+            return testUri.getScheme().equals("http") && host.equals(value.asText()) && testUri.getPath().equals("/test") && testUri.getQuery() == null;
+        } catch (URISyntaxException e) {
+            return false;
+        }
+    }
+}