QR Code possible data types or standards

Question

I am developing an iOS Application for scanning QR Codes. I am successfully able to scan and get code from QR code.

Question:

My question is what are possible data types and format I can expect from QR Codes?

During my search on google I found QR Code can be used for

1. Contact data
2. Calendar data
3. URL
4. Email address
5. Phone number
6. SMS
7. Plain text
8. Geo location

Is this the complete list and is there same standard to represent above data in QR Codes? Means same way of generating QR Code for above QR types.

Is there any standard way of generating and representing data in QR Code?

Answer 1

Basically your text information has to be identifiable for what it is:

There is a very good summary here.

1. Contact data - use MeCard, or vCard (much more verbose), e.g.: MECARD:Surname, First;ADR:123 Some St., Town, Zip Code, Country;EMAIL:some_name@some_ip.com;TEL:[phone];BDAY:19550231;; Gives:

2. Calendar data - No standard seems to be set yet

3. URL: Start your url with the standard format specifier such as http://, e.g.: http://stackoverflow.com/questions/19900835/qr-code-possible-data-types-or-standards Gives:

4. Email address - Start with mailto:[e-mail] gives:

5. Phone number - Start with tel: e.g. tel:[phone] gives:

6. SMS - See the RFC 5724.

7. Plain text - Just include the text.
8. Geo location - Use the geo:lat,long,alt format URI: geo:40.71872,-73.98905,100 (100 feet above Googles offices) gives:
9. WIFI - (ssid is 'abc' and password is '1234'). For WEP encryption: WIFI:S:abc;T:WEP;P:1234;;. For WPA/WPA2: WIFI:S:abc;T:WPA;P:1234;;. Without encryption: WIFI:S:abc;T:nopass;P:1234;;.

All the above example were generated with the Python qrcode package from the command line.

Answer 2

Basically, QR Code returns text data that can be of any type. You can put any type of data in any string format in QR Code. It totally depends on you. You can consider it as
[NSString stringWithFormat].