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HTML is good for debugging, but is unsuitable for application use.
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To see the non HTML representation of the WDDX format, set format=wddx.
See the complete documentation, or API help for more information.
<?xml version="1.0"?>
<wddxPacket version="1.0">
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                    <string>User</string>
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                    <string>first-letter</string>
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                    <string>Archivo</string>
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                  <var name="canonical">
                    <string>File</string>
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                    <string>File talk</string>
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                  <var name="id">
                    <number>8</number>
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                    <string>first-letter</string>
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                  <var name="canonical">
                    <string>MediaWiki</string>
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                    <string>first-letter</string>
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                    <number>10</number>
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                  <var name="case">
                    <string>first-letter</string>
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                  <var name="*">
                    <string>Plantilla</string>
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                  <var name="subpages">
                    <string />
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                  <var name="canonical">
                    <string>Template</string>
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                    <number>11</number>
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                  <var name="case">
                    <string>first-letter</string>
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                  <var name="*">
                    <string>Plantilla discusión</string>
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                    <string>Template talk</string>
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                  <var name="id">
                    <number>12</number>
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                    <string>Ayuda</string>
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                    <string>Help</string>
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                    <string>Category</string>
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                    <number>90</number>
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                    <string>first-letter</string>
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                  <var name="*">
                    <string>Thread</string>
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                    <string>Thread</string>
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                    <number>91</number>
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                    <string>first-letter</string>
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                    <string>Summary</string>
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                  <var name="id">
                    <number>102</number>
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                    <string>first-letter</string>
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                    <string>OERF</string>
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</wddxPacket>