'Filter by issue number' helps you discover content related to a specific Ariande issue of interest.
By using a 'Filter by issue number' field (near top of overview pages), you can narrow down a list of articles related to a tag. Using this filter in effect provides a layered filtering: showing tagged content related to a specified issue number tag.
Specify in the 'Filter by issue number' field your issue of interest (as you start typing, the field automatically tries to show you relevant tags) and then select 'Apply' to check for content tagged with your specified issue number.
As illustrated below, in some cases you may wish to combine filters. If you would like to find every article mentioning 'linked data' in the issue number 'issue67', for example, then you could activate two filters specifying keyword and issue number tags as in the example below.