Approved MITS Standards
NMHC launched the Multifamily Information Transaction Standards (MITS) initiative to improve operating efficiencies for rental housing by developing data models and leveraging data exchange technologies. Through MITS, data transmission among software systems, both within and between organizations, is facilitated through Application Programming Interfaces (APIs) and Extensible Markup Language (XML) to allow systems to communicate in key operational areas.
RETTC is now working to modernize and update MITS by bringing together rental housing providers and suppliers to collaboratively identify opportunities for operational efficiency and transparency that benefit renters and housing affordability.
MITS is freely available for download and its use is completely voluntary.
Working Group Activity Updates – Property-Marketing/ILS version 5 DRAFT
October 16, 2024
A RETTC working group of rental housing providers, internet listing service (ILS) providers, property management software (PMS) providers, and other industry stakeholders has convened. The group is reviewing MITS Property – Marketing/ILS Version 4.1 to identify opportunities to broaden the data model’s scope related to rental housing fees. The review will propose updates to the model that support transparency in communicating the total cost of renting a home—including fees—to prospective and current residents.
To stay updated on our progress and provide feedback during the review and comment period planned for November, please bookmark and return to this page. To join our interest list and receive notification of the review and comment period directly to your in-box, please send an email request to MITS@rettc.org.
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Current Standards
Accounts Payable 4.0
- Accounts Payable 4.0 (xsd)
- Accounts Payable Data Dictionary 4.0 (xls)
Download Accounts Payable 4.0
Collections Version 3.0
- Collections Schema Version 3.0 (xsd)
Download Collections Version 3.0
Core Data 4.0
- Core Data 4.0
Download Core Data 4.0
Lead Management 4.0
- Lead Management Schema Version 4.0 (xsd)
- Lead Management 4.0 Data Dictionary (xls)
- Lead Management 4.0 Supplemental Documentation (html)
- Lead Management 4.0.1 Schema (xsd)
Download Lead Management 4.0
Lease/Application 3.0
- Lease/Application Standard (xsd)
Download Lease Applications 3.0
Property-Marketing/ILS4.1
- Property-Marketing/ILS 4.1 Schema(xsd)
- Property-Marketing/ILS 4.1 Supplemental (html)
Download Property Marketing ISL4.1
Resident Screening 3.0
- Resident Screening Schema Version 3.0 (pdf)
- Resident Screening Data Dictionary Version 3.0 (xls)
- Resident Screening 3.0 (xsd)
Download Resident Screening 3.0
Resident Transactions 3.0
- Resident Transactions Schema Version 3.0 (xsd)
- Resident Transactions Schema Version 3.0 (pdf)
- Resident Transactions Data Dictionary Version 3.0 (xls)
Download Resident Transactions 3.0
Custom Records Extension Component (CREC) Implementation
- A Custom Records Extension Component (CREC) has been added to all MITS Standards to allow firms to define and exchange custom data that is not currently defined within a particular schema through the use of name/value pairs. Download the CREC Summary.
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Prior Versions
Core Data Version 3.0
- Core Data Schema Version 3.0 (xsd)
- Core Data Schema Version 3.0 (pdf)
- Core Data Dictionary 3.0 (xls)
- Core Data 3.0 Release Summary (pdf)
- Core Data 3.0 Schema (Revised as of Sept. 2012)
Download Core Data Version 3.0
Core Data 2.0
- Core Data 2.0 Schema (xsd)
- Core Data 2.0 Schema (pdf)
- Core Data 2.0 Data Dictionary (pdf)
- Core Data 2.0 Full Documentation (pdf)
Download Core Data 2.0
Lead Management 3.0
- Lead Management Schema Version 3.0 (xsd)
- Lead Management Schema Version 3.0 (pdf)
- Lead Management Data Dictionary Version 3.0 (xls)
Download Lead Management 3.0
Lead Management 2.0
- Lead Management Schema Version 2.0 (xsd)
- Lead Management Schema Version 2.0 (pdf)
Download Lead Management 2.0
Property-Marketing 3.0
- Property-Marketing Schema Version 3.0 (xsd)
- Property-Marketing Schema Version 3.0 (pdf)
- Property-Marketing Data Dictionary Version 3.0 (xls)
Download Property-Marketing 3.0
Property-Marketing/ILS 4.0
- Property Marketing/ILS 4.0 (xsd)
Download Property-Marketing/ILS 4.0
Property-Marketing 2.0
- Property-Marketing Schema Version 2.0 (xsd)
- Property-Marketing Schema Version 2.0 (pdf)
- Property-Marketing Data Dictionary Version 2.0 (xls)
Download Property-Marketing 2.00
Resident Transactions 2.0 (xsd)
- Resident Transactions 2.0 Schema (pdf)
- Resident Transactions Data Dictionary 2.0 (xls)
Download Resident Transactions 2.0 (xsd)
Resident Screening 2.0
- Resident Screening Schema Version 2.0 (xsd)
- Resident Screening Schema Version 2.0 (pdf)
- Resident Screening Data Dictionary Version 2.0 (xls)
Download Resident Screening 2.0
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XSLT Compatibility Stylesheets and Supporting Documentation
XSLT Version Compatibility: ILS 1.5-2.0
- 2.0 Full Sample
- 2.0 Schema
- 1.5-2.0 Data Mapping
- 2.0-1.5 Data Mapping
- 1.5-2.0 (mfd)
- 1.5-2.0 Helper Functions File (xlst)
Download XSLT Version Compatibility: ILS 1.5-2.0
XSLT Version Compatibility: ILS 2.0-3.0
- Mapping File - Property Marketing/ILS 2.0-3.0
- Property Marketing/ILS 2.0-3.0 (html)
- 2.0 Schema
- 3.0 Schema
- Mapping File - Property Marketing/ILS 3.0-2.0)
Download XSLT Version Compatibility: ILS 2.0-3.0
XSLT Version Compatibility: Resident Screening 2.0-3.0
- 2.0-3.0 Mapping
- Resident Screening 2.0
- 2.0 Sample
- Resident Screening 3.0
- 3.0 Sample
- Core Data 2.0
- Core Data 3.0
Download XSLT Version Compatibility: Resident Screening 2.0-3.0
XSLT Version Compatibility: Resident Transactions 2.0-3.0
- 2.0-3.0 Data Mapping
- Resident Transactions 2.0
- Resident Transactions 3.0
- Core Data 3.0
- Core Data 2.0
Download XSLT Version Compatibility: Resident Transactions 2.0-3.0
XML Validator Tool
Third-party markup validation too. This validator checks the markup validity of web documents in HTML, XHTML, SMIL, MathML, etc.