hello-world.xml

<?xml version="1.0" encoding="utf-8"?>
<rbl:kb xmlns:rbl="http://rbl.io/schema/RBLang">
    <concept name="person" type="string" />
    <concept name="language" type="string" />
    <concept name="country" type="string" />

    <rel name="speaks" subject="person" object="language" plural="true">
        <firstForm>Does %S speak %O</firstForm>
        <secondFormSubject>Who speaks %O?</secondFormSubject>
        <secondFormObject>What language does %S speak?</secondFormObject>
    </rel>
    <rel name="lives in" subject="person" object="country" plural="false">
        <firstForm>Does %S live in %O?</firstForm>
        <secondFormSubject>Who lives in %O?</secondFormSubject>
        <secondFormObject>Where does %S live?</secondFormObject>
    </rel>
    <rel name="national language" subject="country" object="language" plural="false">
        <firstForm>Is the national language of %S %O?</firstForm>
        <secondFormSubject>Which country's national language is %O?</secondFormSubject>
        <secondFormObject>What is the national language of %S?</secondFormObject>
    </rel>

    <concinst name="Fred" type="person" />
    <concinst name="English" type="language" >
        <meta type="md">
            A West Germanic language that was first spoken in early medieval England and is now a global lingua franca.
        </meta>
    </concinst>
    <concinst name="French" type="language" >
        <meta type="md">
            A Romance language, belonging to the Indo-European family that is an official language in 29 countries, most of which form la francophonie (in French), the community of French-speaking countries.
        </meta>
    </concinst>
    <concinst name="England" type="country" >
        <meta type="md">
            England is a country that is part of the United Kingdom.  It shares land borders with Scotland to the north and Wales to the west.
        </meta>
    </concinst>
    <concinst name="France" type="country" >
        <meta type="md">
            Officially the French Republic (French: République française) , France is a sovereign country in Western Europe that includes several overseas regions and territories.
        </meta>
    </concinst>

    <relinst type="national language" subject="England" object="English" />
    <relinst type="national language" subject="France" object="French" />
    <relinst type="lives in" subject="Fred" object="England" />

    <relinst type="speaks" cf="75" >
        <condition rel="lives in" subject="%S" object="%COUNTRY" />
        <condition rel="national language" subject="%COUNTRY" object="%O" />
    </relinst>

</rbl:kb>