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These classes provide access to a tag technology's features, which vary by the type
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of tag that is scanned. A scanned tag can support multiple technologies, and you can find
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out what they are by calling {@link android.nfc.Tag#getTechList getTechList()}.</p>
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<p>For more information on dealing with tag technologies and handling the ones that you care about, see
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<a href="{@docRoot}guide/topics/nfc/index.html#dispatch">The Tag Dispatch System</a>.
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The {@link android.nfc.tech.TagTechnology} interface provides an overview of the
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supported technologies.</p>
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