Buy Oxygen XML Developer
For the list of the differences between XML Editor, XML Developer and XML Author see the Feature Matrix .
Read the End User License Agreement
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The upgrade can be purchased to bring up-to-date an older version of the same product type (Developer/Author/Editor), edition (Professional/Enterprise) and license model (user-based/floating).
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The SMP Renewal provides unlimited technical support and allows you to benefit of all new versions released during its period of performance, at no additional cost. The SMP Renewal can be bought in up to 14 days after a previous SMP has expired. One SMP Renewal covers one license of Oxygen. Read more
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If you are eligible for the Academic program you can purchase Oxygen XML Editor Academic which includes all Oxygen XML Developer features.