diff --git a/src/main/java/io/kaitai/struct/annotations/Generated.java b/src/main/java/io/kaitai/struct/annotations/Generated.java
index 9eb0406..df13074 100644
--- a/src/main/java/io/kaitai/struct/annotations/Generated.java
+++ b/src/main/java/io/kaitai/struct/annotations/Generated.java
@@ -92,11 +92,4 @@
      *         by class constructors and {@code false}, if it must be called explicitly
      */
     boolean autoRead();
-    /**
-     * Documentation string attached to the type definition, specified in {@code doc}
-     * KSY element.
-     *
-     * @return Documentation string for a type. If documentation is missed, returns empty string
-     */
-    String doc();
 }
diff --git a/src/main/java/io/kaitai/struct/annotations/Instance.java b/src/main/java/io/kaitai/struct/annotations/Instance.java
index 5cd20c1..40f983c 100644
--- a/src/main/java/io/kaitai/struct/annotations/Instance.java
+++ b/src/main/java/io/kaitai/struct/annotations/Instance.java
@@ -45,12 +45,4 @@
      *         Java reserved words. Can not be empty
      */
     String id();
-    /**
-     * Documentation string attached to the instance definition, specified in {@code doc}
-     * KSY element.
-     *
-     * @return Documentation string for an instance. If documentation is missed,
-     *         returns empty string
-     */
-    String doc();
 }
diff --git a/src/main/java/io/kaitai/struct/annotations/Parameter.java b/src/main/java/io/kaitai/struct/annotations/Parameter.java
index c56501f..d6ae2c8 100644
--- a/src/main/java/io/kaitai/struct/annotations/Parameter.java
+++ b/src/main/java/io/kaitai/struct/annotations/Parameter.java
@@ -51,12 +51,4 @@
      * @return 0-based index of a parameter in {@code params} KSY element
      */
     int index();
-    /**
-     * Documentation string attached to the parameter, specified in {@code doc}
-     * KSY element.
-     *
-     * @return Documentation string for parameter. If documentation is missed,
-     *         returns empty string
-     */
-    String doc();
 }
diff --git a/src/main/java/io/kaitai/struct/annotations/SeqItem.java b/src/main/java/io/kaitai/struct/annotations/SeqItem.java
index ae528d2..4a41563 100644
--- a/src/main/java/io/kaitai/struct/annotations/SeqItem.java
+++ b/src/main/java/io/kaitai/struct/annotations/SeqItem.java
@@ -44,19 +44,11 @@
      * @return Identifier, that can differ from field name, if it clash with
      *         Java reserved words. Empty string, if attribute was unnamed
      */
-    String id();
+    String id() default "";
     /**
      * Index of an attribute in sequence of attributes in the type.
      *
      * @return 0-based index of an attribute in {@code seq} KSY element
      */
     int index();
-    /**
-     * Documentation string attached to the attribute, specified in {@code doc}
-     * KSY element.
-     *
-     * @return Documentation string for and attribute. If documentation is missed,
-     *         returns empty string
-     */
-    String doc();
 }