The @separator attribute is used within the <ft:meta> element to define a single character that should be used as a separator when defining hierarchical facets using the @type attribute.
The @separator element is optional within the <ft:meta> element. If not set, the default separator character is |.
The following lines show an example of the @separator attribute:
<?xml version="1.0" encoding="UTF-8"?>
<ft:map ...>
...
<ft:metas>
<ft:meta key="location" type="stringTree">France|Occitanie|Montpellier</ft:meta>
<ft:meta key="location" separator="/" type="stringTree">China/Sichuan/Chengdu</ft:meta>
...
</ft:metas>
<ft:toc>
<ft:node ft:originId="192fe" ft:title="Introduction" href="intro/introduction.html"
type="topic">
<ft:metas>
<ft:meta key="product">myProduct</ft:meta>
<ft:meta key="audience">beginner</ft:meta>
</ft:metas>
</ft:node>
...
</ft:toc>
</ft:map>