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Java Forum / General / September 2006whats is PCDATA ?
i have a DTD file <?xml encoding="UTF-8"?> <!ELEMENT organization (organizationinfo*)> <!ELEMENT stockinfo (name, address,services)> <!ELEMENT name (#PCDATA)> <!ELEMENT address (#PCDATA)> whats this PCDATA above ? what it means ? i dont understand it. please explain with an example . > i have a DTD file [...] > what it means ? i dont understand it. c.l.j.p is about Java programming. Why don't you ask your XML question in an XML group? /gordon  Signature[ don't email me support questions or followups ] g o r d o n + n e w s @ b a l d e r 1 3 . s e > whats this PCDATA above ? It means the content is parsed character data, i.e. it should expand entities etc. > > whats this PCDATA above ? > > It means the content is parsed character data, i.e. it should expand > entities etc. ok , so you mean PCDATA = parsed character data ? whats this parsed character data ? > > > whats this PCDATA above ? > > [quoted text clipped - 3 lines] > ok , so you mean PCDATA = parsed character data ? > whats this parsed character data ? Hungry for knowledge? ..Where is the group's 'spoon'? Andrew T. >>> whats this PCDATA above ? >> [quoted text clipped - 3 lines] > ok , so you mean PCDATA = parsed character data ? > whats this parsed character data ? He just said...: "...it should expand entities etc..." It will be parsed by the xml parser so < and other entities will be expanded. As opposed to CDATA, that will be left alone, unparsed by the parser. SignatureDag. > >>> whats this PCDATA above ? > >> [quoted text clipped - 10 lines] > be expanded. As opposed to CDATA, that will be left alone, unparsed > by the parser. ok i guess so it means in the declaration below <!ELEMENT address (#PCDATA)> see , the parser picks up DTD file to check whether the XML conforms the DTD or not that is it checks for valid XML. i see some of them dont have PCDATA declared in the DTD file except the address element. what happened if i did not decalre PCDATA above ? ........why only the address element has got PCDATA ? its confusing. i dont understand what PCDATA is doing here . anybody please give an example . thanks >>>>> whats this PCDATA above ? >>>> [quoted text clipped - 13 lines] > ok i guess so it means in the declaration below > <!ELEMENT address (#PCDATA)> > see , the parser picks up DTD file to check whether the XML conforms > the DTD or not that is it checks for valid XML. This declares that <address> is a valid tag in any xml document using this DTD, and that the *content* of that <address></address> tag contains character data that must be parsed by the parser reading the xml-document. > i see some of them dont have PCDATA declared in the DTD file except > the address element. > > what happened if i did not decalre PCDATA above ? ........why only the > address element has got PCDATA ? Those two questions must be directed to the author of the DTD. We can't possibly know what he was thinking about. > its confusing. > > i dont understand what PCDATA is doing here . See above... SignatureDag. > >>>>> whats this PCDATA above ? > >>>> [quoted text clipped - 20 lines] > this DTD, and that the *content* of that <address></address> tag contains > character data that must be parsed by the parser reading the xml-document. say i have <address>new york city </address> in XML you told "MUST" so while parser will use this DTD , it will MUST parse the data contained in <address> tag.........but for what ? whats the benefit if we parse or if we dont parse . so, it seems if we put PCDATA then parser will parse the content between the tags. if we DONT put PCDATA then parser will NOT parse the content between the tags. what the hell on this earth will happen if the parser parse or does not parse. suppose, the parser really forced to parse the XML because of this PCDATA constraint .....so what ? it just parsed does it help us any way ? still not able to catch the greatness of this PCDATA . > > i see some of them dont have PCDATA declared in the DTD file except > > the address element. [quoted text clipped - 10 lines] > > See above... <snipped/> >> This declares that <address> is a valid tag in any xml document using >> this DTD, and that the *content* of that <address></address> tag [quoted text clipped - 23 lines] > > still not able to catch the greatness of this PCDATA . What about if the content contained '<', '&', 'Ø' ...? and what about if you used entities like < & and Ø instead? Try, experiment... SignatureDag. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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