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A PDF file is organized using ASCII characters, except for certain elements that may have binary content. The file starts with a header containing a magic number (as a readable string) and the version of the format, for example %PDF-1.7. The format is a subset of a COS ("Carousel" Object Structure) format. [23]
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The concept of a web resource has evolved during the Web's history, from the early notion of static addressable documents or files, to a more generic and abstract definition, now encompassing every "thing" or entity that can be identified, named, addressed or handled, in any way whatsoever, in the web at large, or in any networked information ...
The information need can be specified in the form of a search query. In the case of document retrieval, queries can be based on full-text or other content-based indexing. Information retrieval is the science [ 1 ] of searching for information in a document, searching for documents themselves, and also searching for the metadata that describes ...
Radio-frequency identification (RFID) – Technology using electromagnetic fields to read data stored in tags embedded in other items. Wi-Fi – Technology for local area networking –based on the IEEE 802.11 standard, where devices may communicate through a shared access point or directly between individual devices.
A web application (or web app) is application software that is created with web technologies and runs via a web browser. [1] [2] Web applications emerged during the late 1990s and allowed for the server to dynamically build a response to the request, in contrast to static web pages. [3] Web applications are commonly distributed via a web server ...
Web beacons embedded in emails have greater privacy implications than beacons embedded in web pages. Through the use of an embedded beacon, the sender of an email – or even a third party – can record the same sort of information as an advertiser on a website, namely the time that the email was read, the IP address of the computer that was used to read the email (or the IP address of the ...
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