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#1 |
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Expert Programmer
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What is XML?
What is XML and what are its advantages to HTML?
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#2 | ||
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Expert Programmer
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XML is a language where you can define any data. Check out what wikipedia spits out.
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http://en.wikipedia.org/wiki/Xml Also check out w3scools http://www.w3schools.com/xml/default.asp Quote:
One good example of a real life application that uses xml is gaim the instant messenger. It stores all it's prefernces in XML. I'll post some from one of the pref files. prefs.xml <?xml version='1.0' encoding='UTF-8' ?> <pref version='1.0' name='/'> <pref name='core'> <pref name='away'> <pref name='away_when_idle' type='bool' value='1' /> <pref name='mins_before_away' type='int' value='4' /> <pref name='default_message' type='string' value='Slightly less boring default' /> <pref name='auto_reply' type='string' value='awayidle' /> </pref> <pref name='buddies'> <pref name='use_server_alias' type='bool' value='1' /> </pref> <pref name='contact'> <pref name='last_match' type='bool' value='0' /> <pref name='offline_score' type='int' value='4' /> <pref name='away_score' type='int' value='2' /> <pref name='idle_score' type='int' value='1' /> </pref> <pref name='conversations'> <pref name='use_alias_for_title' type='bool' value='1' /> <pref name='chat'> <pref name='show_nick_change' type='bool' value='1' /> </pref> <pref name='im'> <pref name='send_typing' type='bool' value='0' /> </pref> </pref> <pref name='logging'> <pref name='log_ims' type='bool' value='1' /> <pref name='log_chats' type='bool' value='1' /> <pref name='log_system' type='bool' value='1' /> <pref name='log_signon_signoff' type='bool' value='1' /> <pref name='log_idle_state' type='bool' value='0' /> <pref name='log_away_state' type='bool' value='0' /> <pref name='log_own_states' type='bool' value='1' /> <pref name='format' type='string' value='txt' /> </pref> <pref name='network'> <pref name='auto_ip' type='bool' value='1' /> <pref name='public_ip' type='string' value='' /> <pref name='ports_range_use' type='bool' value='0' /> <pref name='ports_range_start' type='int' value='1024' /> <pref name='ports_range_end' type='int' value='2048' /> </pref> <pref name='proxy'> <pref name='type' type='string' value='none' /> <pref name='host' type='string' value='' /> <pref name='port' type='int' value='0' /> <pref name='username' type='string' value='' /> <pref name='password' type='string' value='' /> </pref> <pref name='sound'> <pref name='while_away' type='bool' value='0' /> </pref> <pref name='ft'> <pref name='public_ip' type='string' value='' /> </pref> </pref> <pref name='plugins'> <pref name='core'> <pref name='autorecon'> <pref name='hide_connected_error' type='bool' value='0' /> <pref name='hide_connecting_error' type='bool' value='0' /> <pref name='restore_state' type='bool' value='1' /> </pref> <pref name='statenotify'> <pref name='notify_away' type='bool' value='1' /> <pref name='notify_idle' type='bool' value='1' /> </pref> </pref> <pref name='lopl' /> <pref name='prpl'> <pref name='jabber'> <pref name='hide_os' type='bool' value='1' /> </pref> <pref name='msn'> <pref name='conv_close_notice' type='bool' value='1' /> <pref name='conv_timeout_notice' type='bool' value='0' /> </pref> <pref name='silc'> <pref name='sign_im' type='bool' value='0' /> <pref name='verify_im' type='bool' value='0' /> <pref name='sign_chat' type='bool' value='0' /> <pref name='verify_chat' type='bool' value='0' /> <pref name='vcard' type='string' value='' /> <pref name='pubkey' type='string' value='C:\Documents and Settings\Frazier PH&A\Application Data\.silc/public_key.pub' /> <pref name='privkey' type='string' value='C:\Documents and Settings\Frazier PH&A\Application Data\.silc/private_key.prv' /> </pref> </pref> <pref name='gtk'> <pref name='docklet'> <pref name='queue_messages' type='bool' value='0' /> </pref> <pref name='kstange'> <pref name='extendedprefs'> <pref name='blist_taskbar' type='bool' value='1' /> <pref name='conv_buttons'> <pref name='warn' type='bool' value='0' /> <pref name='block' type='bool' value='0' /> <pref name='file' type='bool' value='1' /> <pref name='add' type='bool' value='1' /> <pref name='info' type='bool' value='1' /> <pref name='invite' type='bool' value='1' /> </pref> <pref name='conv_size' type='int' value='8' /> <pref name='popup_size' type='int' value='8' /> <pref name='log_size' type='int' value='8' /> <pref name='blist_size' type='int' value='8' /> <pref name='blist_allow_shrink' type='bool' value='1' /> <pref name='conv_zoom' type='int' value='100' /> </pref> </pref> <pref name='extplacement'> <pref name='placement_number' type='int' value='6' /> <pref name='placement_number_separate' type='bool' value='0' /> </pref> <pref name='amc_grim'> <pref name='guifications2'> <pref name='behavior'> <pref name='display_time' type='int' value='6' /> <pref name='throttle' type='int' value='6' /> <pref name='show_while_away' type='bool' value='0' /> <pref name='show_during_screen_saver' type='bool' value='0' /> <pref name='notifications' type='stringlist'> <item value='sign-on' /> <item value='nick-highlight' /> </pref> </pref> <pref name='appearance'> <pref name='position' type='int' value='3' /> <pref name='vertical' type='bool' value='1' /> <pref name='zoom' type='int' value='4' /> <pref name='alias' type='bool' value='1' /> <pref name='show_contacts' type='bool' value='1' /> </pref> <pref name='mouse'> <pref name='left' type='string' value='open' /> <pref name='middle' type='string' value='close' /> <pref name='right' type='string' value='context' /> </pref> <pref name='themes' type='stringlist'> </pref> <pref name='advanced'> <pref name='release_notification' type='bool' value='0' /> <pref name='release_last_check' type='int' value='0' /> <pref name='screen' type='int' value='0' /> <pref name='monitor' type='int' value='0' /> <pref name='sign_on_delay' type='int' value='8000' /> <pref name='hide_conv_focused' type='bool' value='0' /> <pref name='hide_joinleave' type='bool' value='0' /> </pref> </pref> <pref name='guifications'> <pref name='behavior'> <pref name='signon' type='bool' value='1' /> <pref name='signoff' type='bool' value='0' /> <pref name='away' type='bool' value='0' /> <pref name='back' type='bool' value='0' /> <pref name='idle' type='bool' value='0' /> <pref name='unidle' type='bool' value='0' /> <pref name='rcvmsg' type='bool' value='0' /> <pref name='pos' type='int' value='3' /> <pref name='x' type='int' value='0' /> <pref name='y' type='int' value='0' /> <pref name='vertical' type='bool' value='1' /> <pref name='timeout' type='int' value='6' /> <pref name='zoom' type='int' value='4' /> <pref name='alias' type='bool' value='1' /> <pref name='showaway' type='bool' value='1' /> <pref name='mouse1' type='int' value='2' /> <pref name='mouse2' type='int' value='0' /> <pref name='mouse3' type='int' value='4' /> </pref> <pref name='appearance'> <pref name='image' type='bool' value='0' /> <pref name='custom_image' type='string' value='' /> <pref name='font' type='bool' value='0' /> <pref name='face' type='string' value='' /> <pref name='color' type='bool' value='0' /> <pref name='tpos' type='int' value='4' /> <pref name='clip' type='int' value='2' /> <pref name='text_x' type='int' value='0' /> <pref name='text_y' type='int' value='0' /> <pref name='ppos' type='int' value='6' /> <pref name='psize' type='int' value='1' /> <pref name='prot_x' type='int' value='5' /> <pref name='prot_y' type='int' value='5' /> </pref> <pref name='colors'> <pref name='foreground' type='string' value='#000000000000' /> </pref> <pref name='messages'> <pref name='signon' type='string' value='has signed on' /> <pref name='signoff' type='string' value='has signed off' /> <pref name='away' type='string' value='is now away' /> <pref name='back' type='string' value='is now back' /> <pref name='idle' type='string' value='is now idle' /> <pref name='unidle' type='string' value='is no longer idle' /> <pref name='receive' type='string' value='messaged you' /> </pref> <pref name='advanced'> <pref name='delay' type='int' value='7000' /> <pref name='release_notification' type='bool' value='1' /> <pref name='release_check' type='int' value='1091989004' /> </pref> </pref> </pref> <pref name='relnot'> <pref name='last_check' type='int' value='1123540147' /> </pref> <pref name='timestamp'> <pref name='interval' type='int' value='300000' /> </pref> <pref name='win32'> <pref name='wintrans'> <pref name='im_enabled' type='bool' value='0' /> <pref name='im_alpha' type='int' value='146' /> <pref name='im_slider' type='bool' value='0' /> <pref name='bl_enabled' type='bool' value='0' /> <pref name='bl_alpha' type='int' value='182' /> </pref> <pref name='winprefs'> <pref name='dblist_dockable' type='bool' value='1' /> <pref name='dblist_docked' type='bool' value='0' /> <pref name='dblist_height' type='int' value='645' /> <pref name='dblist_side' type='int' value='0' /> <pref name='dblist_on_top' type='bool' value='0' /> <pref name='blist_on_top' type='bool' value='0' /> <pref name='im_blink' type='bool' value='1' /> </pref> </pref> <pref name='accountstate' /> <pref name='vertical_pos' type='int' value='0' /> <pref name='horizontal_pos' type='int' value='0' /> <pref name='show_in_gaim_win' type='bool' value='1' /> <pref name='stay_on_top' type='bool' value='0' /> <pref name='show_in_taskbar' type='bool' value='1' /> <pref name='sticky' type='bool' value='0' /> <pref name='msnnotify'> <pref name='width' type='int' value='92' /> <pref name='height' type='int' value='92' /> <pref name='x' type='int' value='940' /> <pref name='y' type='int' value='0' /> <pref name='duration' type='int' value='5' /> <pref name='received-im-msg' type='bool' value='0' /> <pref name='buddy-away' type='bool' value='0' /> <pref name='buddy-back' type='bool' value='0' /> <pref name='buddy-idle' type='bool' value='0' /> <pref name='buddy-unidle' type='bool' value='0' /> <pref name='buddy-signed-on' type='bool' value='1' /> <pref name='buddy-signed-off' type='bool' value='0' /> <pref name='show-images' type='bool' value='0' /> <pref name='cb-on-click' type='bool' value='1' /> </pref> <pref name='encrypt'> <pref name='accept_unknown_key' type='bool' value='1' /> <pref name='accept_conflicting_key' type='bool' value='0' /> <pref name='encrypt_response' type='bool' value='1' /> <pref name='broadcast_notify' type='bool' value='1' /> <pref name='encrypt_if_notified' type='bool' value='1' /> </pref> </pref> </pref> <pref name='gaim'> <pref name='gtk'> <pref name='accounts'> <pref name='dialog'> <pref name='width' type='int' value='1024' /> <pref name='height' type='int' value='712' /> </pref> </pref> <pref name='away'> <pref name='queue_messages' type='bool' value='0' /> </pref> <pref name='idle'> <pref name='reporting_method' type='string' value='system' /> </pref> <pref name='plugins'> <pref name='loaded' type='stringlist'> <item value='C:\Program Files\Gaim\plugins\ssl-nss.dll' /> <item value='C:\Program Files\Gaim\plugins\ssl.dll' /> <item value='C:\Program Files\Gaim\plugins\winprefs.dll' /> <item value='C:\Program Files\Gaim\plugins\relnot.dll' /> <item value='C:\Program Files\Gaim\plugins\statenotify.dll' /> <item value='C:\Program Files\Gaim\plugins\extendedprefs.dll' /> <item value='C:\Program Files\Gaim\plugins\awaywindow.dll' /> </pref> </pref> <pref name='smileys'> <pref name='theme' type='string' value='C:\Program Files\Gaim\pixmaps\gaim\smileys\none\theme' /> </pref> <pref name='debug'> <pref name='enabled' type='bool' value='0' /> <pref name='timestamps' type='bool' value='1' /> <pref name='toolbar' type='bool' value='1' /> <pref name='width' type='int' value='450' /> <pref name='height' type='int' value='250' /> </pref> <pref name='sound'> <pref name='enabled'> <pref name='login' type='bool' value='1' /> <pref name='logout' type='bool' value='0' /> <pref name='im_recv' type='bool' value='0' /> <pref name='first_im_recv' type='bool' value='0' /> <pref name='send_im' type='bool' value='0' /> <pref name='join_chat' type='bool' value='0' /> <pref name='left_chat' type='bool' value='0' /> <pref name='send_chat_msg' type='bool' value='0' /> <pref name='chat_msg_recv' type='bool' value='0' /> <pref name='nick_said' type='bool' value='1' /> <pref name='pounce_default' type='bool' value='1' /> </pref> <pref name='file'> <pref name='login' type='string' value='C:\Program Files\Gaim\sounds\gaim\arrive.wav' /> <pref name='logout' type='string' value='' /> <pref name='im_recv' type='string' value='' /> <pref name='first_im_recv' type='string' value='' /> <pref name='send_im' type='string' value='' /> <pref name='join_chat' type='string' value='' /> <pref name='left_chat' type='string' value='' /> <pref name='send_chat_msg' type='string' value='' /> <pref name='chat_msg_recv' type='string' value='' /> <pref name='nick_said' type='string' value='' /> <pref name='pounce_default' type='string' value='' /> </pref> <pref name='conv_focus' type='bool' value='1' /> <pref name='command' type='string' value='' /> <pref name='method' type='string' value='automatic' /> </pref> <pref name='blist'> <pref name='auto_expand_contacts' type='bool' value='0' /> <pref name='button_style' type='int' value='2' /> <pref name='grey_idle_buddies' type='bool' value='1' /> <pref name='raise_on_events' type='bool' value='0' /> <pref name='show_buddy_icons' type='bool' value='0' /> <pref name='show_empty_groups' type='bool' value='0' /> <pref name='show_idle_time' type='bool' value='0' /> <pref name='show_offline_buddies' type='bool' value='0' /> <pref name='show_warning_level' type='bool' value='0' /> <pref name='sort_type' type='string' value='alphabetical' /> <pref name='x' type='int' value='781' /> <pref name='y' type='int' value='4' /> <pref name='width' type='int' value='213' /> <pref name='height' type='int' value='701' /> <pref name='tooltip_delay' type='int' value='500' /> </pref> <pref name='conversations'> <pref name='close_on_tabs' type='bool' value='1' /> <pref name='ctrl_enter_sends' type='bool' value='0' /> <pref name='enter_sends' type='bool' value='1' /> <pref name='escape_closes' type='bool' value='0' /> <pref name='send_formatting' type='bool' value='0' /> <pref name='send_bold' type='bool' value='0' /> <pref name='send_italic' type='bool' value='0' /> <pref name='send_underline' type='bool' value='0' /> <pref name='show_timestamps' type='bool' value='1' /> <pref name='spellcheck' type='bool' value='0' /> <pref name='ignore_colors' type='bool' value='1' /> <pref name='ignore_fonts' type='bool' value='1' /> <pref name='ignore_font_sizes' type='bool' value='1' /> <pref name='html_shortcuts' type='bool' value='1' /> <pref name='smiley_shortcuts' type='bool' value='0' /> <pref name='show_formatting_toolbar' type='bool' value='1' /> <pref name='passthrough_unknown_commands' type='bool' value='0' /> <pref name='placement' type='string' value='last' /> <pref name='placement_number' type='int' value='1' /> <pref name='bgcolor' type='string' value='' /> <pref name='fgcolor' type='string' value='#000000' /> <pref name='font_face' type='string' value='courier new' /> <pref name='font_size' type='int' value='3' /> <pref name='tabs' type='bool' value='1' /> <pref name='tab_side' type='int' value='3' /> <pref name='button_type' type='int' value='2' /> <pref name='chat'> <pref name='color_nicks' type='bool' value='1' /> <pref name='default_width' type='int' value='848' /> <pref name='default_height' type='int' value='453' /> <pref name='entry_height' type='int' value='85' /> <pref name='raise_on_events' type='bool' value='0' /> <pref name='button_type' type='int' value='1' /> </pref> <pref name='im'> <pref name='animate_buddy_icons' type='bool' value='1' /> <pref name='default_width' type='int' value='1008' /> <pref name='default_height' type='int' value='515' /> <pref name='entry_height' type='int' value='51' /> <pref name='raise_on_events' type='bool' value='0' /> <pref name='show_buddy_icons' type='bool' value='1' /> </pref> <pref name='enable_commands' type='bool' value='1' /> <pref name='send_strikethrough' type='bool' value='0' /> </pref> <pref name='pounces'> <pref name='default_actions'> <pref name='open-window' type='bool' value='0' /> <pref name='popup-notify' type='bool' value='1' /> <pref name='send-message' type='bool' value='1' /> <pref name='execute-command' type='bool' value='0' /> <pref name='play-sound' type='bool' value='0' /> </pref> </pref> <pref name='filetransfer'> <pref name='clear_finished' type='bool' value='1' /> <pref name='keep_open' type='bool' value='0' /> </pref> <pref name='browsers'> <pref name='new_window' type='bool' value='0' /> <pref name='command' type='string' value='' /> <pref name='browser' type='string' value='mozilla' /> </pref> </pref> </pref> </pref> |
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#3 |
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Expert Programmer
Join Date: Dec 2004
Posts: 794
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HTML and XML are used for different things. HTML is for building webpages, XML is for storing data.
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Few people deserve to be compared to (Rush) Limbaugh, most of them were convicted at the Nuremburg trials. --WilliamSChips on Slashdot |
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#4 |
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Newbie
Join Date: Jun 2005
Posts: 16
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HTML is for humans. Programs are supposed to turn html docs into visually pleasing documents.
XML are for computer to computer communicaion. They could be better processed by programs written to extract data and turn them to information. ---------------------- Help on programming (C/C++, Java, C# or any other programming language) for homework, assignments, course works and projects |
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#5 | |
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Professional Programmer
Join Date: Apr 2005
Location: London, England
Posts: 459
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#6 |
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Expert Programmer
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It's a structured data file to put it simply.
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#7 | |
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Programming Guru
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Location: England
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#8 |
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Expert Programmer
Join Date: Dec 2004
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Yes. XML is useful for storing data, and HTML is useful for writing web pages.
Web pages are a type of data, and XHTML is where the two intersect.
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Few people deserve to be compared to (Rush) Limbaugh, most of them were convicted at the Nuremburg trials. --WilliamSChips on Slashdot |
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#9 |
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Programming Guru
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as i understand it, XML is a markup language where you can define your own tags.
if you want bold italic times new roman you can make a tag <bitnr> that will do that. imagine what you could do with such a language...a whole lot.
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i put on my robe and wizard hat... Have you ever heard of Plato, Aristotle, Socrates?...Morons. |
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#10 |
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Troll
Join Date: Apr 2005
Location: Texas
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You would be amazed at what it is capable of. Take for example a generic RSS feed. The address returns an XML document containing the RSS feed, but the author can add a link to an XML stylesheet at the top that transforms the XML into HTML, such as a table of links. You can point your aggregator and browser at the same address and avoid complicated server side scripting. Convert between schemas, into HTML, plain text, PDF, etc etc.
http://en.wikipedia.org/wiki/XSL_Transformations
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