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CiviCRM custom data storage

I'm thinking about customizing CiviCRM such that custom data can be linked to Personal Campaign Pages. Here are some notes on how the database is set up:

Upon creating a new Custom Data Group, a new table is created called civicrm_value_[group_name]_[group_id] in which the data for this new group will be stored. Columns in this table are id, entity_id (i.e., the id of the user if this data is to be linked to a user), and custom columns for each of the new custom data fields in this group. A new record is also created in the civicrm_custom_group table.

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