International Federation of Data Organization for the Social Sciences
Use 
In spite of the complexity of content nature and organization, few search and downloading options are provided. Overall the site is simple and well-defined, but also somehow too static
Searchability 
Records can be located by browsing through categories, with no keyword search engine
Downloading
Usually only webpages saving is allowed, being the texts offered in html format. Yet, some study packs are offered in pdf format
Navigational Aids
A textual sitemap and other simple tips support navigation. For national archives a clickable textual index is also available
User Friendliness
A simple interface and a clear content categorization enables easy navigation, despite the content and data richness of the provided archives