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bip-xchgrate: Begin Rationale section

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Luke Dashjr 2017-03-04 23:46:46 +00:00
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@ -117,6 +117,17 @@ There are many independent providers of such information, but they all use diffe
By providing a standard interface for retrieving this information, wallets (and other software) and service providers can implement it once, and become immediately interoperable with all other compatible implementations. By providing a standard interface for retrieving this information, wallets (and other software) and service providers can implement it once, and become immediately interoperable with all other compatible implementations.
==Rationale==
Why are multiple results separated by a line-feed rather than using a JSON Array?
* Clients ought to cache historical data, and using a line-feed format allows them to simply append to a cache file.
* Parsing JSON typically requires the entire data parsed together as a single memory object. Using simple lines to separate results, however, allows parsing a single result at a time.
What if long descriptions require line and paragraph breaks?
* Long descriptions support HTML, which has entities for paragraphs and line breaks that do not require literal line-feeds in the data.
==Backwards compatibility== ==Backwards compatibility==
While this new standard is adopted, software and providers can continue to use and provide their current formats until they are no longer needed. While this new standard is adopted, software and providers can continue to use and provide their current formats until they are no longer needed.