Basex XQL merging content with same tag name, regardless of location in document

For example, given XML:

<root>
    <item>
        <id>111</id>
        <description>aisle 12, shelf 3</description>
        <description>inside the box</description>
    </item>
</root>

I would like the result:

<root>
    <item>
        <id>111</id>
        <description>aisle 12, shelf 3 inside the box</description>
    </item>
</root>

But the node may have any name, and be at any level. I would like the same query to work with different XML, as long as the tag is repeated:

<root>
    <item>
        <id>112</id>
        <attributes>
            <author>Joe Smith</author>
            <author>Arthur Clarke</author>
            <author>Jeremiah Wright</author>
        </attributes>
    </item>
</root>

Output:

<root>
    <item>
        <id>112</id>
        <attributes>
            <author>Joe Smith Arthur Clarke Jeremiah Wright</author>
        </attributes>
    </item>
</root>

Is this possible with BaseX ? If not, can we do this given a known element (for example, only for /root/item/attributes/author)?