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e-IRG has recognised the demand for documents that provide advice, best practises and recommendations in various areas. The most recent guidance document is titled "Guide to e-Infrastructure requirements for European Research Infrastructures: An e-IRG support document". This document is intended to help research infrastructures with the process of submitting project proposals for the ESFRI Roadmap 2018.
The document can be downloaded at http://e-irg.eu/catalogue/eirg-1004
Sometimes the e-IRG reacts or collaborates on policy documents that other organisations are publishing.
The latest example is the 2016 Experiences of e-IRG involvement in ESFRI proposal evaluation 
.
You can find more on these documents in the Other Policy Documents Section.
A White Paper provides the e-IRG vision on current important policy topics and directions in e-Infrastructures. It also gives recommendations. There is a new White Paper published every 1-2 years.
The latest White Paper 2014 has been renamed to "e-IRG Guidelines Document - Best practices for the use of e-Infrastructures by large-scale research infrastructures". Find here the pdf file of e-IRG Guideline Document 
For more information and the previous versions read the White Paper Section.
In most of its policy documents, including the White Paper, the e-IRG has a section with recommendations.
An overview of the e-IRG recommendations during the last decade is in the Recommendations section.
The e-IRG organises public workshops twice a year. You can find more information (including programme and slides) in the Events section. For each workshop a public summary is written.
June 2016, Amsterdam Workshop summary
Public summaries of Previous Workshops in the Workshop Reports Section.
e-IRG Roadmaps provide recommendations and visions for how e-Infrastructures should and could be developed over the coming years.
The e-IRG Roadmap 2016 is the current version
The 2012 e-IRG Roadmap is the previous version.
The older versions can be found in the Roadmaps Section.
Blue Papers are like White Papers, but focusing more on one technology area than on e-Infrastructure in general.
The 2012 Blue Paper on Data Management is the most recent one.
A Summary Report of the Recommendations drawn from the Blue Paper on Data Management has been produced together with ESFRI.
More on Blue Papere in the Blue Papers Section.
Task forces are special working groups of the e-IRG that collect and write in-depth reports on specific e-Infrastructure topics.
The most recent document is the Evaluation of e-Infrastructures and the development of related Key Performance Indicators.
Other examples in 2016 is the report of the Long Tail of Data and the overarching working Group report: Experiences of e-IRG involvement in ESFRI proposal evaluation .
Older Taks force reports can be found in the Task Force Reports Section.