The announcement was made during Vishal Sikka's Keynote at SAP TechEd Bangalore.
You can find here the official Developer Press Release issued after the keynote.
An additional comment from SAP: “We are very excited getting these very important announcements out to the developer community to underline SAP's commitment to expand our developer engagement and outreach across our technology platforms”.
SAP will publish the details soon about how to register and get a copy of PB15 beta.
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