Complex sentence: There is a risk to see a replay of the RTF scenario, which remained ambiguous in many areas, this has made it useless as a universal text exchange format, while Microsoft claiming their Schemas are open.
Split into simpler sentences: There is a risk to see a replay of the RTF scenario, which remained ambiguous in many areas. This has made it useless as a universal text exchange format, while Microsoft is claiming their Schemas are open.