Web Crawling

Crawling

: Web crawling is the activity to collect data from the web. Software which is used for crawling is called crawler.

HTML ; the language used to build a web page.

e.g.

<!DOCTYPE html>
<html>
  <head>
    <title> HTML doc. </title>
  </head>
  <body>
    <h1> THIS IS A HTML DOC! </h1>
  </body>
</html>

Selector ; used to indicate data for crawling in HTML.

<html> 
    <head> 
    </head> 
    <body> 
        <h1> 장바구니
            <p id='clothes' class='name' title='라운드티'> 라운드티
                <span class = 'number'> 25 </span> 
                <span class = 'price'> 29000 </span> 
                <span class = 'menu'> 의류</span> 
                <a href = 'http://www.naver.com'> 바로가기 </a> 
            </p> 
            <p id='watch' class='name' title='시계'> 시계
                <span class = 'number'> 28 </span>
                <span class = 'price'> 32000 </span> 
                <span class = 'menu'> 액세서리 </span> 
                <a href = 'http://www.facebook.com'> 바로가기 </a> 
            </p> 
        </h1> 
    </body> 
</html>