CMPSC 431W Lecture Notes - Lecture 12: Document Type Definition, Xml, Data Management

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30 Mar 2019
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Document Summary

Uniform resource identifiers: a set of strings that references certain resources. Has three parts: protocol to access the resource (http, name of the host computer (www. google. com, the path name of the resource (images/2018/new_projects/index. htm) Client (web browser) sends a http request to the server. Client receives reply and makes new requests. No previous interaction is remembered by the protocol. Other functionalities have to be built on top. We can fix this by using cookies. Dynamically generate unique url"s at the server level by coding the states in http messages. Hides the states in the fields of html form. Data intensive internet systems: can be divided into three components: Serves as the primary interface to the user. Technologies: html forms: how to pass data to the middle tier, javascript: create simple functionalities at the presentation tier, style sheets: separate data from formatting.

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