Twitter provides us with a comprehensive definition for hashtags - one most hardcore social media pros can recite by heart - and how they are used. But often when I'm teaching the mystical ways of the Twitterverse to the uninitiated, I find myself describing not just the basic definition but the different forms a hashtag can take. Earlier this year, I included a well rounded definition for each form and some examples of them as I was writing an official Twitter guide for my company. As Carahsoft social strategy evolves, these guides are already becoming an important aide as our social media team grows and we train more of our c-suite level employees on how to get the most from the platform as individuals.
Not only did I take the time to define these hashtags, but I've also implemented a style preference to coincide with each. You'll notice a big fan of AP style and journalistic brevity (given my background) and that carries over into the "Titles" section. Read each of them below:
Compounds      
 | 
  
Two or more words that have been
  compounded into a singular hashtag. Like common compound prefixes, these
  words should not be capitalized. The exception for this rule includes those
  used in Titles. See Titles. Unlike
  common compounds, no hyphens are necessary. 
Examples:  
                 #bigdata – Big Data 
                 #cybercrime – Internet Crime 
                 #opensource – Open Source 
                 #dataanalytics – Data Analytics 
 | 
 
Initialism 
 | 
  
A group of initial letters used as
  an abbreviation for a name or expression. All such hashtags should include
  the capitalization of all letters. Exceptions include initials such as “of”
  in the hashtag #DoD which is the abbreviation for the U.S. Department of
  Defense. 
Examples:
   
                 #BYOD - Bring
  Your Own Device  
                 #CIO – Chief Information Officer 
                 #CISO – Chief
  Information Security Officer 
                
  #DDoS – Distributed Denial
  of Service 
                
  #GIS – Geographic
  Information Systems  
 | 
 
Singular      
 | 
  
All singular words, whether they
  are nouns, adverbs, adjectives or suffixes, which are used as hashtags should
  be lowercase. The exception for this rule includes those used in Titles. See Titles. 
Examples:  
             #virtualization –
  Virtualization 
                 #collaboration – Collaboration 
                 #mobility – Mobility 
                 #cloud – Cloud 
 | 
 
Titles      
 | 
  
As is with the AP styling of
  publication titles, all composition, webcast and on-site event titles should
  include capitalization for all principal words as well as prepositions and
  conjunctions of four or more letters. This includes capitalization of all hashtags,
  including those that are used in truncation. See Truncation. 
Example: 
.@Pentaho webcast today at 2pm ET - #BigData
  Analytics for the #FedGov w/ #MongoDB. http://bit.ly/VrKrfr
  #GovIT 
 | 
 
Truncation 
 | 
  
Typically embodies the
  abbreviation of a word in a format which consists of only the first part of
  the word. In Twitter hashtags, this often consists of multiple words
  combined. These types of hashtags should normally be all lowercased. The
  exclusions for this rule include unique interpretations, proper nouns and the
  use of titles. See Titles. 
Examples: 
                 #digitalgov – Digital
  Government 
                 #infosec –
  Information Security 
                 #mobilegov – Mobile
  Government 
                
  #opengov –
  Open Government 
Exclusions: 
                 #GovTech –
  Government Technology 
                 #GeoINT – Geospatial Intelligence 
                
  #HigherEd – Higher
  Education 
                
  #TechTalk – Technology Talk 
 | 
 
Varied Abbrev. 
 | 
  
Some hashtags include a mixture of
  truncation and initialism style abbreviations. If the truncation precedes the
  initials, then the hashtag should always begin with capitalization. If the
  initials precede truncation, do not capitalize the truncated portion. Single
  initialism followed by truncation should begin with a lowercase, followed by
  capitalization. See Initialism and
  Truncation for comprehensive style
  descriptions. 
Truncation-Initialism: 
                 #GovIT –
  Government IT 
                 #Gov20   – Government 2.0 
                
  #EduIT – IT Education 
Initialism-Truncation: 
                 #CAgov –
  California Government 
                 #ITsecurity - IT
  Security 
                
  #INgov – Indiana Government 
Singular
  Initialism-Truncation: 
                 #eGov –
  Electronic Government 
                 #mLearning – Mobile
  Learning 
                
  #oGov – Open
  Government 
 | 
 
Thanks for reading!

