diff --git a/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientRequestContext.java b/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientRequestContext.java
index 513bb07..688aa77 100644
--- a/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientRequestContext.java
+++ b/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientRequestContext.java
@@ -200,6 +200,12 @@
      * is available via {@link jakarta.ws.rs.ext.RuntimeDelegate#createHeaderDelegate(java.lang.Class)} for the header value
      * class or using its {@code toString} method if a header delegate is not available.
      *
+     * <p>
+     * For example: {@code containsHeaderString("cache-control", "no-store"::equalsIgnoreCase)} will return {@code true} if
+     * a {@code Cache-Control} header exists that has the value {@code no-store}, the value {@code No-Store} or the value
+     * {@code Max-Age, NO-STORE, no-transform}, but {@code false} when it has the value {@code no-store;no-transform}
+     * (missing comma), or the value {@code no - store} (whitespace within value).
+     *
      * @param name the message header.
      * @param valuePredicate value must fulfil this predicate.
      * @return {@code true} if and only if a header with the given name exists, having either a whitespace-trimmed value
diff --git a/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientResponseContext.java b/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientResponseContext.java
index 8ba64e1..807ede7 100644
--- a/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientResponseContext.java
+++ b/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientResponseContext.java
@@ -92,6 +92,12 @@
     /**
      * Checks whether a header with a specific name and value (or item of the comma-separated value list) exists.
      *
+     * <p>
+     * For example: {@code containsHeaderString("cache-control", "no-store"::equalsIgnoreCase)} will return {@code true} if
+     * a {@code Cache-Control} header exists that has the value {@code no-store}, the value {@code No-Store} or the value
+     * {@code Max-Age, NO-STORE, no-transform}, but {@code false} when it has the value {@code no-store;no-transform}
+     * (missing comma), or the value {@code no - store} (whitespace within value).
+     *
      * @param name the message header.
      * @param valuePredicate value must fulfil this predicate.
      * @return {@code true} if and only if a header with the given name exists, having either a whitespace-trimmed value
diff --git a/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerRequestContext.java b/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerRequestContext.java
index fc34ff0..9a50430 100644
--- a/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerRequestContext.java
+++ b/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerRequestContext.java
@@ -232,6 +232,12 @@
     /**
      * Checks whether a header with a specific name and value (or item of the comma-separated value list) exists.
      *
+     * <p>
+     * For example: {@code containsHeaderString("cache-control", "no-store"::equalsIgnoreCase)} will return {@code true} if
+     * a {@code Cache-Control} header exists that has the value {@code no-store}, the value {@code No-Store} or the value
+     * {@code Max-Age, NO-STORE, no-transform}, but {@code false} when it has the value {@code no-store;no-transform}
+     * (missing comma), or the value {@code no - store} (whitespace within value).
+     *
      * @param name the message header.
      * @param valuePredicate value must fulfil this predicate.
      * @return {@code true} if and only if a header with the given name exists, having either a whitespace-trimmed value
diff --git a/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerResponseContext.java b/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerResponseContext.java
index b0829ff..2a7f46f 100644
--- a/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerResponseContext.java
+++ b/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerResponseContext.java
@@ -122,6 +122,12 @@
      * is available via {@link jakarta.ws.rs.ext.RuntimeDelegate#createHeaderDelegate(java.lang.Class)} for the header value
      * class or using its {@code toString} method if a header delegate is not available.
      *
+     * <p>
+     * For example: {@code containsHeaderString("cache-control", "no-store"::equalsIgnoreCase)} will return {@code true} if
+     * a {@code Cache-Control} header exists that has the value {@code no-store}, the value {@code No-Store} or the value
+     * {@code Max-Age, NO-STORE, no-transform}, but {@code false} when it has the value {@code no-store;no-transform}
+     * (missing comma), or the value {@code no - store} (whitespace within value).
+     *
      * @param name the message header.
      * @param valuePredicate value must fulfil this predicate.
      * @return {@code true} if and only if a header with the given name exists, having either a whitespace-trimmed value
diff --git a/jaxrs-api/src/main/java/jakarta/ws/rs/core/HttpHeaders.java b/jaxrs-api/src/main/java/jakarta/ws/rs/core/HttpHeaders.java
index 2ab8e91..8cd8e10 100644
--- a/jaxrs-api/src/main/java/jakarta/ws/rs/core/HttpHeaders.java
+++ b/jaxrs-api/src/main/java/jakarta/ws/rs/core/HttpHeaders.java
@@ -68,6 +68,12 @@
      * is available via {@link jakarta.ws.rs.ext.RuntimeDelegate#createHeaderDelegate(java.lang.Class)} for the header value
      * class or using its {@code toString} method if a header delegate is not available.
      *
+     * <p>
+     * For example: {@code containsHeaderString("cache-control", "no-store"::equalsIgnoreCase)} will return {@code true} if
+     * a {@code Cache-Control} header exists that has the value {@code no-store}, the value {@code No-Store} or the value
+     * {@code Max-Age, NO-STORE, no-transform}, but {@code false} when it has the value {@code no-store;no-transform}
+     * (missing comma), or the value {@code no - store} (whitespace within value).
+     *
      * @param name the message header.
      * @param valuePredicate value must fulfil this predicate.
      * @return {@code true} if and only if a header with the given name exists, having either a whitespace-trimmed value