// read feed tag
reader.require(XMLStreamConstants.START_ELEMENT, Edm.NAMESPACE_ATOM_2005, FormatXml.ATOM_FEED);
Map<String, String> foundPrefix2NamespaceUri = extractNamespacesFromTag(reader);
foundPrefix2NamespaceUri.putAll(readProperties.getValidatedPrefixNamespaceUris());
checkAllMandatoryNamespacesAvailable(foundPrefix2NamespaceUri);
EntityProviderReadProperties entryReadProperties =
EntityProviderReadProperties.initFrom(readProperties).addValidatedPrefixes(foundPrefix2NamespaceUri).build();
// read feed data (metadata and entries)
return readFeedData(reader, eia, entryReadProperties);
} catch (XMLStreamException e) {