Hi Ladies and Gentlemen, I've done the E-R diagram of RSS Reader, preview: [image: 内嵌图片 1]
description: 1. feed is the primary entity, it may contains many "tags" , "articles(items)" and necessary attributes; 2. article(item) is the secondary entity, every article(item) has its own attributes. I separate article(item) from feed(which has a complete xml include articles) because the reader doesn't need to read the whole xml content if the user just wants to read one article, also, the design team will have more freedom to design the interaction with one article(item); 3. tag, means ... maybe call it "category" >_< 4. favourite, favourite articles; * the attachment is a gia source file, pls use Dia(sudo apt-get install dia) to open it and feel free to discuss :)
<<rss.png>>
rss.dia
Description: Binary data
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