Blueprint does not support prop namespace

<?xml version="1.0" encoding="UTF-8"?>

<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"

           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 

           xmlns:camel="http://camel.apache.org/schema/blueprint"

           xmlns:cm="http://aries.apache.org/blueprint/xmlns/blueprint-cm/v1.1.0"

           xmlns:prop="http://camel.apache.org/schema/placeholder"

        xsi:schemaLocation="

           http://www.osgi.org/xmlns/blueprint/v1.0.0 http://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd

           http://aries.apache.org/blueprint/xmlns/blueprint-cm/v1.1.0 http://aries.apache.org/schemas/blueprint-cm/blueprint-cm-1.1.0.xsd

           http://camel.apache.org/schema/blueprint http://camel.apache.org/schema/blueprint/camel-blueprint.xsd">

    <cm:property-placeholder id="myblueprint.placeholder" persistent-id="test">

        <cm:default-properties>

            <cm:property name="aggregationTimeout" value="30000" />

        </cm:default-properties>

    </cm:property-placeholder>

    <camelContext xmlns="http://camel.apache.org/schema/blueprint">

        <route>

            <from uri="direct:start"/>

            <aggregate strategyRef="aggregatorStrategy" prop:completionTimeout="aggregationTimeout">

                <correlationExpression>

                    <simple>header.id</simple>

                </correlationExpression>

                <to uri="mock:aggregated"/>

            </aggregate>

        </route>

    </camelContext>

    <bean id="aggregatorStrategy" class="org.apache.camel.processor.aggregate.UseLatestAggregationStrategy"/>

</blueprint>