schema.xml

<?xml version="1.0" encoding="UTF-8"?>
 
<schema version="1.0" xmlns="http://www.apple.com/metadata"
                      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                      xsi:schemaLocation="http://www.apple.com/metadata file:///System/Library/Frameworks/CoreServices.framework/Frameworks/Metadata.framework/Resources/MetadataSchema.xsd">
    <!--
            The 'attributes' section defines custom attributes that this metadata importer supports.  
            Below is an example of a multivalued string attribute.  Uncomment this part 
            of the file if you need to define a custom attribute.
     
            'multivalued' indicates whether the attribute is an array type or not.
     
            'type' indicates the data type of the attribute.   
                        Available types are CFString, CFNumber, CFDate, CFBoolean and CFData.  
     
            If you don't need to define a custom attribute, it is safe to remove this section.
            
    <attributes>
        <attribute name="com_Foo_YourAttrName" multivalued="true" type="CFString"/>
    </attributes>
     
            
            To see the system's definitions for the builtin attributes and file types, look at the system schema,
            /System/Library/Frameworks/CoreServices.framework/Frameworks/Metadata.framework/Resources/schema.xml
    -->

    <types>
        <type name="SUPPORTED_UTI_TYPE">  <!-- add one <type>...</type> entry for each UTI that you need to define. -->
         
            <!-- 'allattrs' is a whitespace separated list of all of the attributes that this UTI type normally has.
                 It does not have to be exhaustive. -->
            <allattrs> 
            </allattrs>
            <!-- 'displayattrs' is a whitespace separated list of the attributes that should normally be displayed when previewing files of this UTI type. -->
            <displayattrs>
            </displayattrs>
            
        </type>
    </types>
</schema>