The acronym NDEF means «NFC Data Exchange Format». It is the term that means the typical formatting of a NFC tagthat can be recognied as such by devices smartphone and tablet with integrated NFC reader. This formatting has been developed by NFC Forum, the entityin charge of «standardization» of NFC technology

NDEF records can contain different information such as:
-Link URI
– Mailto
– Text field
– Connection parameters (Bluetooth: PIN,  BT address… Wi-Fi: SSID….)
– Business card (vCard)

The number of different applications that can be memorized inside a NFC tag, except the capacity of available memory, are not limited