Update README.md

README.md

@@ -63,7 +63,7 @@ Each `*.jsonl` file contains one problem or activity per line:
   text: ‘string representing activity or problem’,
   metadata: { source id, unit, lesson, other location data , url if possible, html version}, # this is source-specific
   acquisition_date: '', # YYYY-MM-DD
-  elements: {identifier : path to image files or html of element}, # html elements, e.g. table, img, figure interweaved with text
+  elements: {identifier : name of image file or html of table}, # table, img, figure interweaved with text
   standards: [list of (relation, standard)], # relation could be addressing, alignment, building towards, etc
   source: '', 
 }
@@ -71,7 +71,7 @@ Each `*.jsonl` file contains one problem or activity per line:
 
 Note: Among standard relation types, `Addressing` == `Alignment`, and we evaluate on these in our paper. Future work may investigate other types of relations between problems and math skills/concepts.
 
-Images are in the `images` folder, and filenames should match values of problems' `elements` dicts. 
+Images are in the `images` folder, in zipped files named after image filenames' prefixes: `fl_problem`, `im_lesson`, `im_modelingprompt`, `im_practice`, `im_task`. 
 
 ## Dataset Creation