An object's metadata is distributed in normalized fashion across of the a dictionary generally in a database. Data about data: generally a database reflect a normalized set of the data that reference a business context; now imagine this same normalized database (that referecence a business context) holding another data, that can to make another set of informations of variety forms. It's complicated a first time.
Imagine, that you have a system application and only one client using it; now imagine that your business has successfully and you have got anothers clients. Now you have more clients and each client has a particular necessity in somescreens that your system application; You can to create a differents tables for each necessity, but it's wellcome when you have two or three clients - Imagine that you have a hundred clients. What would you do in this case ? Create a hundred different tables for each necessity ? In metadata, you create a normalized dictionary and hold differents data types with different proposites and keep a relation between its, so you can to get this same datas (from different screens and fields) and formulate a new set informations, that a same business context. Imagine the follow situation in a screen: CLIENT 1 want : Client [ xxxxxx ] <= 30 characters Street [ yyyyyyyyyyy ] <= 50 characters CLIENT 2 want: Client Name [ uuuuuu ] <= 80 characters STREET, AVENUE [ rrrrrrrrr ] <= 100 CHARACTERS Note, the labels and lengths of fields are differents for each client, but the nature of the information it's the same. How do would you hold that informations for later to make a report like it ? Remember, here in the sample we have only two clients - you have 100 clients with labels and length fields differents. CLient Street xxxxxx yyyyyyy uuuuu rrrrrrrr THINK IT ? I tried to explain using a simple manner, no much theoric. GREETINGS SORRY, ENGLISH IS NOT MY FIRST LANGUAGE. GILSON D'ELREI WEB SYSTEM ANALYST CPM - BRAZIL > ----- Mensagem original ----- > De: krithikav [SMTP:[EMAIL PROTECTED]] > Enviada em: quinta-feira, 10 de janeiro de 2002 03:39 > Para: [EMAIL PROTECTED] > Assunto: MetaTag and MetaData > > Hi, > I am a novice to JSP.. and web related stuff.. Now I am going through a > tutorial for content management for an assignment and I come across > keywords like 'metatag and metadata'. Here I can understand that metatag > is an instruction to the browser. But what is meta data? When I search > teh web, it says, metadata is "data about data". > Is it some attributes of a document like 'Author' and 'Created By' etc. > Any pointers about how it is used and some examples will be highly > useful to me. > > > Thanks, > Krithika > > ========================================================================== > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff > JSP-INTEREST". > For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST > DIGEST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://archives.java.sun.com/jsp-interest.html > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.jsp > http://www.jguru.com/faq/index.jsp > http://www.jspinsider.com =========================================================================== To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant FAQs on JSP/Servlets can be found at: http://archives.java.sun.com/jsp-interest.html http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.jsp http://www.jguru.com/faq/index.jsp http://www.jspinsider.com
