Market Data Definition Language (MDDL)
Google
The Financial Information Services Division of the Software & Information Industry Association
MDDL 2.5-beta : preferredClass
MDDL 2.5-betaSchema DocumentationNo Graphics?
Index: MDDL 2.5-beta Schema Documentation
Element: preferredClass
Description: Preferred Class - Equity Domain. Preferred Equity.
Used by: equityDomain 
Attributes:  
Uses: agencyRatings  amountOutstanding  analytics  debtIssueData  diary  factor  marketDerivedInfo  debtPricing  deferred  dividend  trade  industryIdentifier  instrumentIdentifier  issueData  ask  bid  mid  orderbook  spread  sequence 
Classification: "class"
Diagram: