Last modified: 2014-10-28 23:28:35 UTC
See: https://en.wikipedia.org/wiki/Special:ApiSandbox#action=query&prop=imageinfo&format=json&iiprop=extmetadata&iilimit=10&titles=File%3ABlack_Hawk_Down_Super64_over_Mogadishu_coast.jpg Several fields have `_: "<some text>"` as their value, instead of (as expected) a human-readable string. For example: ``` "ObjectName": { "value": { "_": "Sold 12 Nws " }, "source": "file-metadata", "hidden": "" }, "ImageDescription": { "value": { "_": "Michael Durant's helicopter over Mogadishu. Mike Goodale rode on this one." }, "source": "file-metadata" }, "Artist": { "value": { "_": "LABCOPY" }, "source": "file-metadata" }, "Credit": { "value": { "_": "INQ LABCOPY" }, "source": "file-metadata", "hidden": "" }, ``` This is crashing the OCG bundler, which expects the `value` property to contain a human-readable string, not a JSON object.
We're fairly sure that this is happening because the file has an EXIF author and source, but no information template. But I can't verify that because there are basically no other files like that.
I think this happens when the EXIF data contains a child XML tag where an attribute would be expected. The _ key is a quirk of the MediaWiki API when it encounters data which cannot be trivially converted from XML to JSON (or vice versa).
