The same information via 'ask' or 'show'

From semantic-mediawiki.org

In a lot of cases issues appear along the way when constructing queries.

1) Looking for a solution via result formats was right. The particular format used is "list", so you can use it's "sep" parameter to define another separator between results and let "arraydefine" work with it:

{{#arraydefine: values
 |{{#ask:
  [[Has installation type::+]]
  |?Has installation type
  |mainlabel=-
  |headers=hide
  |format=list
  |sep=;
 }}
 |;
 |unique, sort=desc
}}

2) Probably you do not want to have the "see more" link at all, since this is not a reusable value. Add the "searchlabel" parameter and hide the standard output. Also increase the result limit to a value higher than the number of expected results to make sure that you do not cut off valid values.

{{#arraydefine: values
 |{{#ask:
  [[Has installation type::+]]
  |?Has installation type
  |mainlabel=-
  |headers=hide
  |format=list
  |sep=;
  |searchlabel=
  |limit=500
 }}
 |;
 |unique, sort=desc
}}

Note configuration parameter $smwgQMaxInlineLimitSets the maximal number of rows ever printed by queries in connection with the limit parameter.

22:39, 19 April 2018

Thank you very much! Both answers are 100% useful.

11:49, 15 June 2018