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Since /programmes first went live we've been working to ensure that programme data was accessible to people and machines alike. The API design was baked in at the application design stage. Similarly we've worked on adding to HTML pages as a lightweight API. All broadcasts use the microformat to add start times, end times, broadcast channels etc.

Unfortunately there have been a over hCalendar's use of the . This uses the HTML abbreviation element to add machine data to pages. Our concerns were:

• the effect on blind users using screen readers with abbreviation expansion turned on where abbreviations designed for machines would be read out
• the effect on partially sighted users using screen readers where tool tips of abbreviations designed for machines would be read out
• the effect of incomprehensible tooltips on users with cognitive disabilities
• the potential fencing off of abbreviations to domains that need them (travel - , finance - etc)

Until these issues are resolved the ´óÏó´«Ã½ semantic markup standards have been updated to prevent the use of non-human-readable text in abbreviations. As I type the revised standard has not been published - I'll update this post with a link when that happens. Updated standard is here. For this reason we've taken the decision to remove the hCalendar microformat from /programmes until:

• either the ´óÏó´«Ã½ accessibility group does further testing and declares the abbreviation design pattern to be safe to use
• or the microformats community settles on an accessible alternative to the abbreviation design pattern. has already been started by .

hCalendar will be gone from /programmes by the next deploy (probably this Thursday).

In the meantime we'll be looking at the possible use of (a slightly bigger S technology similar to microformats but without some of the more unexpected side-effects).

Apologies to who's been using hCalendar to help with screen-scraping of /programmes. We know we've been for and the /programmes development team will be campaigning to bring this up the product backlog. In the meantime schedules are already available as json and xml. Leave a comment if there are specific views / formats you'd like to see next.

Probably best to note that this only affects microformats using the abbreviation design pattern. Any and microformats will remain (at least until/if we fully embrace RDF-a). And probably also best to note that this is not a decision that has come down from on high by the . The /programmes team has been concerned about this issue for a few months now and it's good to get some clarity here.

Stay tuned to radiolabs and we'll keep you updated if / as things change.