Question 

Why do some collections contain some portfolios that do not have article level linking, and link only at title level?

Answer 

These collections contain a number of different linking syntax and the system is currently unable to support more than one type of linking syntax within a collection. In these cases to ensure continued access to all the portfolios within the collection, Exlibris and KB+ have agreed to support deep linking for the majority of the portfolios but allow journal level linking for any portfolios with a variant syntax. Please see below for the collections affected.

Affected collections

• KB+ JISC Collections Royal Society Of Chemistry Journals Archive 1841-2004 (2017-2020)