diff --git a/crd-generator/api/src/main/java/io/fabric8/crd/generator/annotation/SchemaSwap.java b/crd-generator/api/src/main/java/io/fabric8/crd/generator/annotation/SchemaSwap.java
index 6a7c7b7f8fb..86e889edaf2 100644
--- a/crd-generator/api/src/main/java/io/fabric8/crd/generator/annotation/SchemaSwap.java
+++ b/crd-generator/api/src/main/java/io/fabric8/crd/generator/annotation/SchemaSwap.java
@@ -17,13 +17,39 @@
 
 import java.lang.annotation.*;
 
-@Target({ ElementType.ANNOTATION_TYPE, ElementType.TYPE_USE, ElementType.TYPE })
+/**
+ * Annotation that allows replacing a nested schema with one from another class.
+ *
+ * This is an alternative to {@link SchemaFrom} for cases when the classes
+ * are coming from an external source and fields cannot be annotated directly.
+ *
+ * @see SchemaFrom
+ */
+@Target({ElementType.ANNOTATION_TYPE, ElementType.TYPE_USE, ElementType.TYPE})
 @Retention(RetentionPolicy.RUNTIME)
 @Repeatable(SchemaSwaps.class)
 public @interface SchemaSwap {
+  /**
+   * The owning class of the field whose type is to be replaced.
+   * <p>
+   * It is an error if the type is not used in the same schema hierarchy where the {@link SchemaSwap} is used.
+   */
   Class<?> originalType();
 
+  /**
+   * Name of the field whose type is to be replaced.
+   * <p>
+   * The name should be specified exactly as defined in the Java class, before any renames
+   * and transformations ({@code @JsonProperty} and similar) take place.
+   * <p>
+   * It is an error if the field does not exist on {@link #originalType()}
+   */
   String fieldName();
 
+  /**
+   * The replacement schema that will be used for the {@link #fieldName()} instead of its specified type
+   * <p>
+   * The default value of {@code void.class} causes the field to be skipped
+   */
   Class<?> targetType() default void.class;
 }
diff --git a/crd-generator/api/src/main/java/io/fabric8/crd/generator/annotation/SchemaSwaps.java b/crd-generator/api/src/main/java/io/fabric8/crd/generator/annotation/SchemaSwaps.java
index c734e473187..fb99288d4e3 100644
--- a/crd-generator/api/src/main/java/io/fabric8/crd/generator/annotation/SchemaSwaps.java
+++ b/crd-generator/api/src/main/java/io/fabric8/crd/generator/annotation/SchemaSwaps.java
@@ -20,6 +20,9 @@
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 
+/**
+ * A container for multiple {@link SchemaSwap}s
+ */
 @Target({ ElementType.ANNOTATION_TYPE, ElementType.TYPE_USE, ElementType.TYPE })
 @Retention(RetentionPolicy.RUNTIME)
 public @interface SchemaSwaps {