Budgets as datasets
A growing number of governments make their budget expenditure data available as machine-readable spreadsheets. This is the preferred method for many users, as it is accessible and requires few software skills to get started. Other countries release longer reports that discuss budget priorities as a narrative. Some countries do something in between where they release reports that contain tables, but that are published in PDF and other formats from which the data is difficult to extract.
On the revenue side, the picture is considerably bleaker, as many governments are still entrenched in the mindset of releasing revenue estimates as large reports that are mostly narrative with little easily extractable data. Tax expenditure reports often suffer from these same problems.
Still, some areas that relate to government revenue are beginning to be much better documented and databases are beginning to be established. This includes budget support through development aid, for which data is published under the IATI (http://www.aidtransparency.net/) and OECD DAC CRS (http://stats.oecd.org/Index.aspx?DatasetCode=CRSNEW) schemes. Data about revenues from extractive industries is starting to be covered under the EITI (http://eiti.org/) with the US and various other regions introducing new rules for mandatory and granular disclosure of extractives revenue. Data regarding loans and debt is fairly scattered, with the World Bank providing a positive example (https://finances.worldbank.org/), while other major lenders (such as the IMF) only report highly aggregated figures. An overview of related data sources can be found at the Public Debt Management Network (http://www.publicdebtnet.org/public/Statistics/).
