<P> Although not a standard, Microformat (also mentioned in the section metadata on the internet below) is a web - based approach to semantic markup which seeks to re-use existing HTML / XHTML tags to convey metadata . Microformat follows XHTML and HTML standards but is not a standard in itself . One advocate of microformats, Tantek Çelik, characterized a problem with alternative approaches: </P> <Table> <Tr> <Td> "</Td> <Td> Here's a new language we want you to learn, and now you need to output these additional files on your server . It's a hassle . (Microformats) lower the barrier to entry . </Td> <Td>" </Td> </Tr> </Table> <Tr> <Td> "</Td> <Td> Here's a new language we want you to learn, and now you need to output these additional files on your server . It's a hassle . (Microformats) lower the barrier to entry . </Td> <Td>" </Td> </Tr> <P> Metadata may be written into a digital photo file that will identify who owns it, copyright and contact information, what brand or model of camera created the file, along with exposure information (shutter speed, f - stop, etc .) and descriptive information, such as keywords about the photo, making the file or image searchable on a computer and / or the Internet . Some metadata is created by the camera and some is input by the photographer and / or software after downloading to a computer . Most digital cameras write metadata about model number, shutter speed, etc., and some enable you to edit it; this functionality has been available on most Nikon DSLRs since the Nikon D3, on most new Canon cameras since the Canon EOS 7D, and on most Pentax DSLRs since the Pentax K - 3 . Metadata can be used to make organizing in post-production easier with the use of key - wording . Filters can be used to analyze a specific set of photographs and create selections on criteria like rating or capture time . </P>

What are some examples of file formats that can store metadata