States of the type attribute
Text (type=text) state
The text attribute specifies the text data that encoded in QR code.
QR Code is capable of handling all types of data, such as numeric and alphabetic characters, 2 byte characters and symbols. Up to 7,089 characters can be encoded in one symbol.
When an QR element's type attribute is in the Text state, the rules in this section apply.
URL state (type=url)
The url attribute specifies the URLs (include URIs, URNs) that encoded in QR code. A URL is that provides the destination of the hyperlink. If the href attribute is not specified, the element represents a placeholder hyperlink. [[!RFC2397]],[[!RFC3406]],[[!RFC3966]],[[!RFC3986]],[[!RFC3987]]
mailto:hollobit@etri.re.kr
tel:+82-111-1111-1111
sms:<number>
mms:<number>
geo:40.71872,-73.98905,100
market://details?id=org.example.foo
youtube://ID
WIFI:T:WPA;S:mynetwork;P:mypass;;
facetime:<number>
skype:<username|number>?query
irc://<url>:query
aim:query?<username>
ymsgr:query?<email|number>
gtalk:query?<email>
When an QR element's type attribute is in the URL state, the rules in this
section apply.
The value attribute, if
specified and not empty, must have a value that is a valid URL
potentially surrounded by spaces that is also an
absolute URL.
The value sanitization algorithm is as
follows: Strip line breaks from the value, then strip leading and
trailing whitespace from the value.
Constraint validation: While the value of the element is neither the
empty string nor a valid
absolute URL, the element is suffering from a
type mismatch.
The contact attribute specifies the contact information that encoded in QR code. Contact information includes personal contact information (e.g. name, company, phone number… et.al). Contact information’s format is stored in a plain text file which is formatted according to the dedicated specification (e.g. vCard. MECARD, Bizcard specification). [[!RFC4770]], [[!RFC2426]]
BIZCARD:N:Jonathan;X:Jeon;T:Software Engineer;C:ETRI;A:76 9th Avenue, New York, NY 10011;B:+12125551212;E:someone@etri.re.kr;;
MECARD:N:Jonathan,Jeon;ADR:161, Kajong-Dong, YuSong-Gu, Daejeon, South Korea 305-350;TEL:+82-10-1111-1111;EMAIL:hollobit@etri.re.kr;;
When an QR element's type attribute is in the Contact state, the rules in this section apply.
Calendar state (type=calendar)
The calendar attribute specifies the calendar event information that encoded in QR code. Calendar information includes event information (e.g. event name, location, description, start date, end date, end time… et.al). It can also specify the URL of event file (e.g. vCal, iCalendar). [[!RFC2445]]
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//hacksw/handcal//NONSGML v1.0//EN
BEGIN:VEVENT
UID:uid1@example.com
DTSTAMP:20130714T170000Z
ORGANIZER;CN=Jonathan Jeon:MAILTO:hollobit@example.com
DTSTART:20130714T170000Z
DTEND:20130715T035959Z
SUMMARY:WG F2F meeting
END:VEVENT
END:VCALENDAR
@@ TBW - vCal example
When an QR element's type attribute is in the Calendar state, the rules in this section apply.
The version attribute
The version attribute specifies the symbol versions of QR Code range from Version 1 to Version 40.
Each version has a different module configuration or number of modules. (The module refers to the black and white dots that make up QR Code.)
"Module configuration" refers to the number of modules contained in a symbol, commencing with Version 1 (21 × 21 modules) up to Version 40 (177 × 177 modules). Each higher version number comprises 4 additional modules per side.
The error attribute
The error attribute specifies the error correction capability to restore data if the code is dirty or damaged. Four error correction levels (Low, Medium, Quartile, High) are available for users to choose according to the operating environment. Raising this level improves error correction capability but also increases the amount of data QR Code size.
Low : 7% of codewords can be restored.
Medium : 15% of codewords can be restored.
Quartile : 25% of codewords can be restored.
High : 30% of codewords can be restored.
