Showview is the European name for Video Plus+. Most TV Guides such as those included in the papers and Magazines list a sequence of digits beside each programme. This is the Video Plus+ code for the programme.
When setting up a timer on the LVW-5025+ (or any other recorder that supports Video Plus+), it gives the option to enter a Video Plus+ code. Once this is entered, it decodes the start time, recording duration and channel number from the code. The following image shows an example of a Video Plus+ code entered on my LVW-5045:
Some further information can be fuond on this Wikipedia article.