This use case presents a product line made of different versioned items.
Several of these items use a similar metadata key / value pair to declare product versions.
For example, a DITA map for a vacuum cleaner's instructions uses the following vrm element:
<vrm release="vacuum-cleaner" version="1" modification="1"/>
In the same corpus, a DITA map for a dishwasher's instructions uses the following vrm element:
<vrm release="dishwasher" version="1" modification="2"/>
Both products have the version="1" attribute in common, which makes distinguishing the products based on the vrm_version metadata impossible.
Fluid Topics concatenates the attributes of the vrm element to create a single version metadata. For example:
<vrm release="dishwasher" version="1" modification="2"/>
becomes:
1.dishwasher.2
To create facets allowing to precisely select a product and its versions, it is possible to use the Enrich and clean feature to create hierarchical facets.