The schema needs to cover mappings of input elements and labels, data types of valid input values, and range constraints of the input values. Many deep web contents related applications, like named entity attribute collection, topic-focused crawling, and heterogeneous data integration, are based on understanding schema of these query interfaces. Internet users need to fill in query conditions in the HTML query interface and click the submit button to obtain deep web data. These deep web contents, hidden behind the query interfaces, are of much better quality than those in the surface web. Add as many as you like! You can find the list of Xtraz for download on the Xtraz Gallery.Along with the popularity of the world wide web, data volumes inside web databases have been increasing tremendously. Now you can create, download, use and share with friends fun and useful applications such as music, games, gadgets and tools. ICQ Open Xtraz are web based applications developed by ICQ users for enriching your ICQ experience. In the message window you can also choose to display your photo or one of ICQ's unique, animated devils. This means that you can send your friends & contacts greeting cards and invitations to games, multi chats, video sessions, and more directly from your client and/or the message window. You can customize your ICQ to be exactly what you need and always up-to-date by adding shortcuts to your favorite features in order to launch them directly from your ICQ. If you're away from your personal computer you can still chat with friends and contacts, even where the ICQ client is not installed, by using the web-based ICQ2Go that works from any computer. With ICQ Instant Messenger you can video/audio chat, send email, SMS and wireless-pager messages, as well as transfer files and URLs.
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