Interoperability is a crucial issue for electronic government due to the need of agencies’ information systems to be totally integrated and able to exchange data in a seamless way. A way to achieve it is by the establishing of a Government Interoperability Framework (GIF). However, this is a difficulty task to be carried out, due not only to technological issues but also other aspects. This research is expected to contribute to the identification of the barriers to the adoption of interoperability standards for electronic government. The paper presents the preliminary findings from a case study of the Brazilian Government framework (e-PING), based on analyses of documents and face-to-face interviews. It points out some aspects that may influence the establishment of these standards, becoming barriers to their adoption.