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Table 1 Classification of the importance of the W3C Web Contents Accessibility

From: A study on the current status and strategies for improvement of web accessibility compliance of public institutions

Importance Importance 1 Importance 2 Importance 3
Concept Must Should May
Definition Must comply Should comply May comply
Significance -Fulfillment of basic requirements -Removal of grave defects -Removal of slight defects
-Guarantee of web accessibility -Increase in web accessibility -Improvement of web accessibility
-Access to web contents is impossible in case of noncompliance -Causes difficulty in accessing web contents in case of noncompliance -Causes inconvenience in accessing web contents in case of noncompliance
  1. Source: Joo (2009), “A Study on the Current Situation of Web Accessibility of the Public Institutions and IT Conglomerates,” Korea Computer Information Society Journal 14(1): 175–187