Hi, Thanks for updating the draft.
I want to wait for at least a weak before we start a vote. Does anyone have an opinion about file extension of Apache Arrow format data? What do you think about ".arrow"? Thanks, -- kou In <cae4ayb1bo0fozh4oy5hkzhv5oq6s-bqywfdgd7cpjb1czct...@mail.gmail.com> "Re: Please Review: Application for a Media Type" on Wed, 21 Apr 2021 08:17:40 -1000, Weston Pace <weston.p...@gmail.com> wrote: > Thank you for reviewing. I have added your suggestions to the draft. > Are we ready for a vote? If so I will clean up the comments and send > out a clean version of the draft. > > On Mon, Apr 19, 2021 at 3:10 PM Sutou Kouhei <k...@clear-code.com> wrote: >> >> Hi, >> >> Sorry for not responding this... >> >> Weston, thanks for writing up the draft! >> https://docs.google.com/document/d/1PmZFoSifV_TX4vXnv775WiOtqCgz5zLF5ryFRWio3HQ/edit?usp=sharing >> >> Here are items we need to discuss before we apply a media >> type to IANA: >> >> 1. Interoperability Considerations >> >> Draft: >> >> > The Apache arrow format is intended to be a language >> > independent columnar memory format for flat and >> > hierarchical data. It has been shown to work in a variety >> > of languages and applications. Arrow files can be >> > provided in two different formats, a streaming format >> > (vnd.apache.arrow.stream) and a random access format >> > (vnd.apache.arrow.file). Applications should be aware of >> > which format they are processing as the two are not >> > interchangeable. >> >> Note in draft: >> >> > Should we mention something like "applications should >> > make sure to check the 'version' field to ensure they >> > can process the file"? >> >> How about referring our format document for further >> information instead of mention the 'version' field? >> https://arrow.apache.org/docs/format/Columnar.html >> >> XML Media Types also refers the XML specification for >> further information: >> >> https://tools.ietf.org/html/rfc7303#section-9.1 >> >> > For further information, see Section 2.9 "Standalone >> > Document Declaration" and Section 5 "Conformance" of [XML]. >> >> >> 2. File extension(s) >> >> Draft: >> >> > N/A >> >> Note in draft: >> >> > Again, there are no formal extensions that have been >> > recommended before. Do we want to introduce any? I'm >> > pretty sure this is in no way binding (and it's unlikely >> > anyone will ever see it). >> >> I want recommended extensions to avoid spreading various >> extensions for Apache Arrow formats. >> >> How about the followings? >> >> * vnd.apache.arrow.file: .arrow >> * vnd.apache.arrow.stream: NA >> (Generally, this format isn't saved as file. This format >> is used for pipe, sending/receiving via socket and so on.) >> >> FYI: Here is a list that shows used extensions in our code >> base. >> >> Our integration test uses the following extensions: >> >> * vnd.apache.arrow.file: .arrow_file >> * vnd.apache.arrow.stream: .stream >> >> https://github.com/apache/arrow/blob/master/dev/archery/archery/integration/runner.py#L250-L257 >> >> log('-- Validating file') >> producer_file_path = os.path.join( >> gold_dir, "generated_" + test_case.name + ".arrow_file") >> consumer.validate(json_path, producer_file_path) >> >> log('-- Validating stream') >> consumer_stream_path = os.path.join( >> gold_dir, "generated_" + test_case.name + ".stream") >> >> Our C++ tests use the following extensions: >> >> * vnd.apache.arrow.file: Not used (in-memory buffer is used) >> * vnd.apache.arrow.stream: Not used (in-memory buffer is used) >> >> Our C++ examples use the following extensions: >> >> * vnd.apache.arrow.file: .arrow >> * vnd.apache.arrow.stream: NA >> >> https://github.com/apache/arrow/blob/master/cpp/examples/minimal_build/example.cc#L34 >> >> const char* arrow_filename = "test.arrow"; >> >> Our Python documentation uses the following extensions: >> >> * vnd.apache.arrow.file: .arrow >> * vnd.apache.arrow.stream: Not used (in-memory buffer is used) >> >> https://github.com/apache/arrow/blob/master/docs/source/python/filesystems.rst >> >> with local.open_output_stream("test.arrow") as file: >> >> Our Go tests use the following extensions: >> >> * vnd.apache.arrow.file: Not used (no extension) >> * vnd.apache.arrow.stream: Not used (no extension) >> >> Our Java tests use the following extensions: >> >> * vnd.apache.arrow.file: .arrow >> * vnd.apache.arrow.stream: .arrow but most of tests use in-memory buffer >> >> https://github.com/apache/arrow/blob/master/java/vector/src/test/java/org/apache/arrow/vector/ipc/TestArrowFile.java#L51 >> >> File file = new File("target/mytest_write.arrow"); >> >> https://github.com/apache/arrow/blob/master/java/vector/src/test/java/org/apache/arrow/vector/ipc/TestRoundTrip.java#L176 >> >> final File temp = File.createTempFile("arrow-test-" + name + "-", >> ".arrow"); >> >> Our JavaScript tests use the following extensions: >> >> * vnd.apache.arrow.file: Not used (in-memory buffer is used) >> * vnd.apache.arrow.stream: Not used (in-memory buffer is used) >> >> Our Julia tests use the following extensions: >> >> * vnd.apache.arrow.file: Not used (in-memory buffer is used) >> * vnd.apache.arrow.stream: Not used (in-memory buffer is used) >> >> Our Rust tests use the following extensions: >> >> * vnd.apache.arrow.file: .arrow_file >> * vnd.apache.arrow.stream: .stream >> >> Note that they use data in our integration test. >> >> >> Thanks, >> -- >> kou >> >> In <cajpuwmckzuppmol-o0+d6fjwk-eas2teyf_pw0qzthhvx-9...@mail.gmail.com> >> "Re: Please Review: Application for a Media Type" on Fri, 22 Jan 2021 >> 14:37:35 -0600, >> Wes McKinney <wesmck...@gmail.com> wrote: >> >> > Thank you for taking the lead on this. I gave a brief read through and >> > I think it makes sense using Thrift or Protocol Buffers as a >> > guideline. Would be good for some others to review who might be >> > familiar with IANA media formats >> > >> > On Wed, Jan 20, 2021 at 6:17 PM Weston Pace <weston.p...@gmail.com> wrote: >> >> >> >> Per a previous discussion >> >> (https://lists.apache.org/thread.html/b15726d0c0da2223ba1b45a226ef86263f688b20532a30535cd5e267%40%3Cdev.arrow.apache.org%3E) >> >> and the resulting JIRA issue ARROW-7396 >> >> (https://issues.apache.org/jira/browse/ARROW-7396) there is a desire >> >> to register the arrow format with the IANA as a formal media type >> >> (actually two media types, one for the streaming format and one for >> >> the file format). >> >> >> >> The form for applying is here: https://www.iana.org/form/media-types >> >> >> >> I have created a draft registration document (link below). >> >> >> >> The only fields with any real flexibility are "Security >> >> Considerations", "Interoperability Considerations", and "Application >> >> Usage". I reviewed the applications for XML, JSON, and Thrift and >> >> I've made a best attempt at these fields as well as posted examples >> >> from the other languages. Please review and feel free to suggest >> >> changes. >> >> >> >> https://docs.google.com/document/d/1PmZFoSifV_TX4vXnv775WiOtqCgz5zLF5ryFRWio3HQ/edit?usp=sharing >> >> >> >> One we align on the content we should probably have a PMC member >> >> actually make the submission and be listed as contact person. >> >> >> >> Thanks, >> >> >> >> Weston Pace >> >> Ursa Computing
