Interesting flags:

<?xml version="1.0" encoding="UTF-8"?>
<save>
    <version major="4" minor="0" revision="0" build="16"/>
    <region id="Flags">
        <node id="root">
            <attribute id="Description" type="LSString" value="Cazador has a surnatural sense of if you killed any of its spawn."/>
            <attribute id="Name" type="FixedString" value="GRA_VampireBoss_Knows_KilledVampire"/>
            <attribute id="UUID" type="guid" value="63c991a8-7f70-4f87-9f86-b0224f951ade"/>
            <attribute id="Usage" type="uint8" value="5"/>
        </node>
    </region>
</save>

<?xml version="1.0" encoding="UTF-8"?>
<save>
    <version major="4" minor="0" revision="0" build="16"/>
    <region id="Flags">
        <node id="root">
            <attribute id="Description" type="LSString" value="Cazador knows someone is coming"/>
            <attribute id="Name" type="FixedString" value="GRA_VampireBoss_Knows_HasBeenWarned"/>
            <attribute id="UUID" type="guid" value="8917b363-2670-45bf-ba79-478970b55cd6"/>
            <attribute id="Usage" type="uint8" value="5"/>
        </node>
    </region>
</save>

<?xml version="1.0" encoding="UTF-8"?>
<save>
    <version major="4" minor="0" revision="0" build="34"/>
    <region id="Flags">
        <node id="root">
            <attribute id="Description" type="LSString" value="Astarion-companion gets his Vampire Bite after this flag is set (in a dialog or outside it)"/>
            <attribute id="Name" type="FixedString" value="ORI_Astarion_Event_UnlockVampireBite"/>
            <attribute id="UUID" type="guid" value="a887e372-d8a1-430f-809f-b0c7169920eb"/>
            <attribute id="Usage" type="uint8" value="5"/>
        </node>
    </region>
</save>

<?xml version="1.0" encoding="UTF-8"?>
<save>
    <version major="4" minor="0" revision="0" build="16"/>
    <region id="Flags">
        <node id="root">
            <attribute id="Description" type="LSString" value=""/>
            <attribute id="Name" type="FixedString" value="GRA_CorridorVampire_State_RefusedDrink"/>
            <attribute id="UUID" type="guid" value="b9e19227-a2f8-4b43-be2c-ea6492b34b93"/>
            <attribute id="Usage" type="uint8" value="6"/>
        </node>
    </region>
</save>