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https://en.m.wiktionary.org/wiki/derp
In this context, a DERP Group is a collection of accounts on the Steem blockchain that operates in an anomalous fashion.
All anomalous groups requiring special containment procedures are assigned a Group Class. A Group Class is a part of the standard DERP template and serves as a rough indicator for how difficult a group is to contain. Group Classes are for the purposes of identifying containment needs, research priority, budgeting, and other considerations. A DERP's Group Class is determined by a number of factors, but the most important factors are the difficulty and the purpose of its containment.
Group Classes:
Safe - groups that are easily and safely containedEuclid - groups that require more resources to contain completely or where containment isn't always reliableKeter - groups that are exceedingly difficult to contain consistently or reliably, with containment procedures often being extensive and complexThaumiel - groups used to contain other groupsNeutralized - groups that are no longer anomalous, either through having been intentionally or accidentally destroyed, disabled, or disbandedGroup Series:
A group series roughly corresponds to bull market formations where general interest in the platform peaks (also known as The Woodwork).
001-999: Series I forming from March, 2016 to April, 2017
1000-1999: Series II forming from May, 2017 to January, 2019
2000-2999: Series III forming from February, 2019 to present
Typical format for DERP-nnnn reports are as follows:
group: DERP-nnnn
class: Safe Euclid Keter Thaumiel Neutralized
derp_score:
special_containment_procedures:
description:
associated_accounts:
-
related_links:
-
With ...
group: DERP-nnnn being in the correct series.class: selection being one of the specified Group Class types.derp_score: being the Daily Estimated Reward Pool impactspecial_containment_procedures: being the current opposition or compensating controls required to contain the group, if anydescription: exploring "who" and "what" this group isassociated_accounts: key accounts related to the grouprelated_links: (optional) specific URLs to justify the DERPRecommended format: YAML
Recommended maximum columns: 60 characters
These are the rules on the community main page, but with more detail.