Phil Bradley takes a look at the development of search engines over the lifetime of Ariadne and points to what we might anticipate in the years to come. <a href="/issue47">issue47</a> April 2006 <a href="/category/article-type/feature-article">feature article</a> <a href="/taxonomy/term/534/author-info">phil bradley</a> Duncan Burbidge describes a new approach to digitising an archive both as a future-proof substitute and for Web delivery. <a href="/issue47">issue47</a> April 2006 <a href="/category/article-type/feature-article">feature article</a> <a href="/taxonomy/term/869/author-info">duncan burbidge</a> Eileen Fenton outlines issues relating to the long-term preservation of digital resources and the characteristics of an archival entity responding to this need. <a href="/issue47">issue47</a> April 2006 <a href="/category/article-type/feature-article">feature article</a> <a href="/taxonomy/term/870/author-info">eileen fenton</a> Debra Hiom, in the first of a two-part series on the Resource Discovery Network, looks back at the development of the RDN and its activities to date. <a href="/issue47">issue47</a> April 2006 <a href="/category/article-type/feature-article">feature article</a> <a href="/taxonomy/term/193/author-info">debra hiom</a> Debra Hiom provides a timeline of the RDN's development, which accompanies her main article. <a href="/issue47">issue47</a> April 2006 <a href="/category/article-type/feature-article">feature article</a> <a href="/taxonomy/term/193/author-info">debra hiom</a> Aaron Krowne and Urvashi Gadi present a framework which improves searching in the context of scholarly digital libraries by taking a 'quality metrics-aware' approach. <a href="/issue47">issue47</a> April 2006 <a href="/category/article-type/feature-article">feature article</a> <a href="/taxonomy/term/871/author-info">aaron krowne</a>, <a href="/taxonomy/term/872/author-info">urvashi gadi</a> Terry Reese discusses the creation of a shared knowledge base system within OSU's open-source metasearch development. <a href="/issue47">issue47</a> April 2006 <a href="/category/article-type/feature-article">feature article</a> <a href="/taxonomy/term/873/author-info">terry reese</a> R. John Robertson introduces a project examining the potential benefits of OAI-PMH Static Repositories as a means of enabling small publishers to participate more fully in the information environment. <a href="/issue47">issue47</a> April 2006 <a href="/category/article-type/feature-article">feature article</a> <a href="/taxonomy/term/874/author-info">r. john robertson</a> Emma Tonkin suggests that rising new ideas are often on their second circuit - and none the worse for that. <a href="/issue47">issue47</a> April 2006 <a href="/category/article-type/feature-article">feature article</a> <a href="/taxonomy/term/809/author-info">emma tonkin</a> Theo van Veen shows with the help of an example, how standardised descriptions of services can help users control the integration of services from different providers. <a href="/issue47">issue47</a> April 2006 <a href="/category/article-type/feature-article">feature article</a> <a href="/taxonomy/term/875/author-info">theo van veen</a>