Google has an extensive search feature added to his App Engine. The api, which is still in the experimental stage, allows users of the Google App Engine in full-text-search to their applications to add.
“This release contains many new features, including searching specific fields and ranges, and advanced features like scoring and snippeting,” according to the Google App Engine Full Text Search Team. Users may use the experimental api, among other uses, in combination with their apps to products index, prijsreeksen to search, and keywords in articles and comments to compare.