CHANGES.rst

3.0.0 (unreleased)

The ASDF Standard is at v1.6.0

• Drop support for ASDF-in-FITS. [#1288]
• Add all_array_storage, all_array_compression and all_array_compression_kwargs to asdf.config.AsdfConfig [#1468]
• Move built-in tags to converters (except ndarray and integer). [#1474]
• Add block storage support to Converter [#1508]
• Remove deprecated legacy extension API [#1464]
• Fix issue opening files that don't support fileno [#1557]
• Allow Converters to defer conversion to other Converters by returning None in Converter.select_tag [#1561]
• Remove deprecated tests.helpers [#1597]
• Remove deprecated load_custom_schema [#1596]
• Remove deprecated TagDefinition.schema_uri [#1595]
• Removed deprecated AsdfFile.open and deprecated asdf.open AsdfFile.write_to and AsdfFile.update kwargs [#1592]
• Fix AsdfFile.info loading all array data [#1572]
• Blank out AsdfFile.tree on close [#1575]

2.15.1 (2023-08-07)

The ASDF Standard is at v1.6.0

• Drop Python 3.8 support [#1556]
• Drop NumPy 1.20, 1.21 support [#1568]
• Convert numpy scalars to python types during yaml encoding to handle NEP51 changes for numpy 2.0 [#1605]
• Vendorize jsonschema 4.17.3 [#1591]

2.15.0 (2023-03-28)

The ASDF Standard is at v1.6.0

• Require numpy<1.25 for python 3.8 [#1327]
• Add AsdfProvisionalAPIWarning to warn developers of new features that may undergo breaking changes but are likely to be included as stable features (without this warning) in a future version of ASDF [#1295]
• Add AsdfDeprecationWarning to AsdfFile.blocks [#1336]
• Document policy for ASDF release cycle including when support for ASDF versions end. Also document dependency support policy. [#1323]
• Update lower pins on numpy (per release policy), packaging, and pyyaml to ones that we can successfully build and test against. [#1360]
• Provide more informative filename when failing to open a file [#1357]
• Add new plugin type for custom schema validators. [#1328]
• Add AsdfDeprecationWarning to asdf.types.CustomType [#1359]
• Throw more useful error when provided with a path containing an extra leading slash [#1356]
• Add AsdfDeprecationWarning to AsdfInFits. Support for reading and writing ASDF in fits files is being moved to stdatamodels. [#1337]
• Add AsdfDeprecationWarning to asdf.resolver [#1362]
• Add AsdfDeprecationWarning to asdf.tests.helpers.assert_extension_correctness [#1388]
• Add AsdfDeprecationWarning to asdf.type_index [#1403]
• Add warning to use of asdftool extract and remove-hdu about deprecation and impending removal [#1411]
• Deprecate AsdfFile attributes that use the legacy extension api [#1417]
• Add AsdfDeprecationWarning to asdf.types [#1401]
• deprecate default_extensions, get_default_resolver and get_cached_asdf_extension_list in asdf.extension [#1409]
• move asdf.types.format_tag to asdf.testing.helpers.format_tag [#1433]
• Deprecate AsdfExtenion, AsdfExtensionList, BuiltinExtension [#1429]
• Add AsdfDeprecationWarning to asdf_extensions entry point [#1361]
• Deprecate asdf.tests.helpers [#1440]
• respect umask when determining file permissions for written files [#1451]
• rename master branch to main [#1479]

2.14.4 (2022-03-17)

The ASDF Standard is at v1.6.0

• require jsonschema<4.18 [#1487]

2.14.3 (2022-12-15)

The ASDF Standard is at v1.6.0

• Use importlib_metadata for all python versions [#1260]
• Fix issue #1268, where update could fail to clear memmaps for some files [#1269]
• Bump asdf-transform-schemas version [#1278]

2.14.2 (2022-12-05)

The ASDF Standard is at v1.6.0

• Fix issue #1256, where enum could not be used on tagged objects. [#1257]

2.14.1 (2022-11-23)

The ASDF Standard is at v1.6.0

• Fix issue #1239, close memmap with asdf file context [#1241]
• Add ndarray-1.1.0 and integer-1.1.0 support [#1250]

2.14.0 (2022-11-22)

The ASDF Standard is at v1.6.0

• Update citation. [#1184]
• Add search support to ~asdf.AsdfFile.schema_info. [#1187]
• Add asdf.search.AsdfSearchResult support for ~asdf.AsdfFile.schema_info and ~asdf.search.AsdfSearchResult.schema_info method. [#1197]
• Use forc ndarray flag to correctly test for fortran array contiguity [#1206]
• Unpin jsonschema version and fix jsonschema deprecation warnings. [#1185]
• Replace pkg_resources with importlib.metadata. [#1199]
• Fix default validation for jsonschema 4.10+ [#1203]
• Add asdf-unit-schemas as a dependency, for backwards compatibility. [#1210]
• Remove stray toplevel packages docker docs and compatibility_tests from wheel [#1214]
• Close files opened during a failed call to asdf.open [#1221]
• Modify generic_file for fsspec compatibility [#1226]
• Add fsspec http filesystem support [#1228]
• Memmap whole file instead of each array [#1230]
• Fix issue #1232 where array data was duplicated during resaving of a fits file [#1234]

2.13.0 (2022-08-19)

The ASDF Standard is at v1.6.0

• Add ability to pull information from schema about asdf file data, using ~asdf.AsdfFile.schema_info method. [#1167]

2.12.1 (2022-08-17)

The ASDF Standard is at v1.6.0

• Overhaul of the ASDF documentation to make it more consistent and readable. [#1142, #1152]
• Update deprecated instances of abstractproperty to abstractmethod [#1148]
• Move build configuration into pyproject.toml [#1149, #1155]
• Pin jsonschema to below 4.10.0. [#1171]

2.12.0 (2022-06-06)

The ASDF Standard is at v1.6.0

• Added ability to display title as a comment in using the info() functionality. [#1138]
• Add ability to set asdf-standard version for schema example items. [#1143]

2.11.2 (2022-08-17)

• Backport jsonschema pin to strictly less than 4.10.1. [#1175]

2.11.1 (2022-04-15)

The ASDF Standard is at v1.6.0

• Update minimum astropy version to 5.0.4. [#1133]

2.11.0 (2022-03-15)

The ASDF Standard is at v1.6.0

• Update minimum jsonschema version to 4.0.1. [#1105]

2.10.1 (2022-03-02)

The ASDF Standard is at v1.6.0

• Bugfix for circular build dependency for asdf. [#1094]
• Fix small bug with handling multiple schema uris per tag. [#1095]

2.10.0 (2022-02-17)

The ASDF Standard is at v1.6.0

• Replace asdf-standard submodule with pypi package. [#1079]

2.9.2 (2022-02-07)

The ASDF Standard is at v1.6.0

• Fix deprecation warnings stemming from the release of pytest 7.0.0. [#1075]
• Fix bug in pytest plugin when schemas are not in a directory named "schemas". [#1076]

2.9.1 (2022-02-03)

The ASDF Standard is at v1.6.0

• Fix typo in testing module __init__.py name. [#1071]

2.9.0 (2022-02-02)

The ASDF Standard is at v1.6.0

• Added the capability for tag classes to provide an interface to asdf info functionality to obtain information about the class attributes rather than appear as an opaque class object. [#1052 #1055]
• Fix tag listing when extension is not fully implemented. [#1034]
• Drop support for Python 3.6. [#1054]
• Adjustments to compression plugin tests and documentation. [#1053]
• Update setup.py to raise error if "git submodule update --init" has not been run. [#1057]
• Add ability for tags to correspond to multiple schema_uri, with an implied allOf among the schema_uris. [#1058, #1069]
• Add the URL of the file being parsed to SerializationContext. [#1065]
• Add asdf.testing.helpers module with simplified versions of test helpers previously available in asdf.tests.helpers. [#1067]

2.8.3 (2021-12-13)

The ASDF Standard is at v1.6.0

• Fix more use of 'python' where 'python3' is intended. [#1033]

2.8.2 (2021-12-06)

The ASDF Standard is at v1.6.0

• Update documentation to reflect new 2.8 features. [#998]
• Fix array compression for non-native byte order [#1010]
• Fix use of 'python' where 'python3' is intended. [#1026]
• Fix schema URI resolving when the URI prefix is also claimed by a legacy extension. [#1029]
• Remove 'name' and 'version' attributes from NDArrayType instances. [#1031]

2.8.1 (2021-06-09)

• Fix bug in block manager when a new block is added to an existing file without a block index. [#1000]

2.8.0 (2021-05-12)

The ASDF Standard is at v1.6.0

• Add yaml_tag_handles property to allow definition of custom yaml %TAG handles in the asdf file header. [#963]
• Add new resource mapping API for extending asdf with additional schemas. [#819, #828, #843, #846]
• Add global configuration mechanism. [#819, #839, #844, #847]
• Drop support for automatic serialization of subclass attributes. [#825]
• Support asdf:// as a URI scheme. [#854, #855]
• Include only extensions used during serialization in a file's metadata. [#848, #864]
• Drop support for Python 3.5. [#856]
• Add new extension API to support versioned extensions. [#850, #851, #853, #857, #874]
• Permit wildcard in tag validator URIs. [#858, #865]
• Implement support for ASDF Standard 1.6.0. This version of the standard limits mapping keys to string, integer, or boolean. [#866]
• Stop removing schema defaults for all ASDF Standard versions, and automatically fill defaults only for versions <= 1.5.0. [#860]
• Stop removing keys with None values from the tree on write. This fixes a long-standing issue where the tree structure is not preserved on write, but will break ExtensionType subclasses that depend on this behavior. Extension developers will need to modify their to_tree methods to check for None before adding a key to the tree (or modify the schema to permit nulls, if that is the intention). [#863]
• Deprecated the auto_inline argument to AsdfFile.write_to and AsdfFile.update and added AsdfConfig.array_inline_threshold. [#882, #991]
• Add edit subcommand to asdftool for efficient editing of the YAML portion of an ASDF file. [#873, #922]
• Increase limit on integer literals to signed 64-bit. [#894]
• Remove the asdf.test method and asdf.__githash__ attribute. [#943]
• Add support for custom compression via extensions. [#931]
• Remove unnecessary .tree from search result paths. [#954]
• Drop support for bugs in older operating systems and Python versions. [#955]
• Add argument to asdftool diff that ignores tree nodes that match a JMESPath expression. [#956]
• Fix behavior of exception argument to GenericFile.seek_until. [#980]
• Fix issues in file type detection to allow non-seekable input and filenames without recognizable extensions. Remove the asdf.asdf.is_asdf_file function. [#978]
• Update asdftool extensions and asdftool tags to incorporate the new extension API. [#988]
• Add AsdfSearchResult.replace method for assigning new values to search results. [#981]
• Search for block index starting from end of file. Fixes rare bug when a data block contains a block index. [#990]
• Update asdf-standard to 1.6.0 tag. [#993]

2.7.5 (2021-06-09)

The ASDF Standard is at v1.5.0

• Fix bug in asdf.schema.check_schema causing relative references in metaschemas to be resolved incorrectly. [#987]
• Fix bug in block manager when a new block is added to an existing file without a block index. [#1000]

2.7.4 (2021-04-30)

The ASDF Standard is at v1.5.0

• Fix pytest plugin failure under older versions of pytest. [#934]
• Copy array views when the base array is non-contiguous. [#949]
• Prohibit views over FITS arrays that change dtype. [#952]
• Add support for HTTPS URLs and following redirects. [#971]
• Prevent astropy warnings in tests when opening known bad files. [#977]

2.7.3 (2021-02-25)

The ASDF Standard is at v1.5.0

• Add pytest plugin options to skip and xfail individual tests and xfail the unsupported ndarray-1.0.0 example. [#929]
• Fix bug resulting in invalid strides values for views over FITS arrays. [#930]

2.7.2 (2021-01-15)

The ASDF Standard is at v1.5.0

• Fix bug causing test collection failures in some environments. [#889]
• Fix bug when decompressing arrays with numpy 1.20. [#901, #909]

2.7.1 (2020-08-18)

The ASDF Standard is at v1.5.0

• Fix bug preventing access to copied array data after AsdfFile is closed. [#869]

2.7.0 (2020-07-23)

The ASDF Standard is at v1.5.0

• Fix bug preventing diff of files containing ndarray-1.0.0 objects in simplified form. [#786]
• Fix bug causing duplicate elements to appear when calling copy.deepcopy on a TaggedList. [#788]
• Improve validator performance by skipping unnecessary step of copying schema objects. [#784]
• Fix bug with auto_inline option where inline blocks are not converted to internal when they exceed the threshold. [#802]
• Fix misinterpretation of byte order of blocks stored in FITS files. [#810]
• Improve read performance by skipping unnecessary rebuild of tagged tree. [#787]
• Add option to asdf.open and fits_embed.AsdfInFits.open that disables validation on read. [#792]
• Fix bugs and code style found by adding F and W flake8 checks. [#797]
• Eliminate warnings in pytest plugin by using from_parent when available. [#799]
• Prevent validation of empty tree when AsdfFile is initialized. [#794]
• All warnings now subclass asdf.exceptions.AsdfWarning. [#804]
• Improve warning message when falling back to an older schema, and note that fallback behavior will be removed in 3.0. [#806]
• Drop support for jsonschema 2.x. [#807]
• Stop traversing oneOf and anyOf combiners when filling or removing default values. [#811]
• Fix bug in version map caching that caused incompatible tags to be written under ASDF Standard 1.0.0. [#821]
• Fix bug that corrupted ndarrays when the underlying block array was converted to C order on write. [#827]
• Fix bug that produced unreadable ASDF files when an ndarray in the tree was both offset and broadcasted. [#827]
• Fix bug preventing validation of default values in schema.check_schema. [#785]
• Add option to disable validation of schema default values in the pytest plugin. [#831]
• Prevent errors when extension metadata contains additional properties. [#832]

2.6.0 (2020-04-22)

The ASDF Standard is at v1.5.0

• AsdfDeprecationWarning now subclasses DeprecationWarning. [#710]
• Resolve external references in custom schemas, and deprecate asdf.schema.load_custom_schema. [#738]
• Add asdf.info for displaying a summary of a tree, and AsdfFile.search for searching a tree. [#736]
• Add pytest plugin option to skip warning when a tag is unrecognized. [#771]
• Fix generic_io read_blocks() reading past the requested size [#773]
• Add support for ASDF Standard 1.5.0, which includes several new transform schemas. [#776]
• Enable validation and serialization of previously unhandled numpy scalar types. [#778]
• Fix handling of trees containing implicit internal references and reference cycles. Eliminate need to call yamlutil.custom_tree_to_tagged_tree and yamlutil.tagged_tree_to_custom_tree from extension code, and allow ExtensionType subclasses to return generators. [#777]
• Fix bug preventing history entries when a file was previously saved without them. [#779]
• Update developer overview documentation to describe design of changes to handle internal references and reference cycles. [#781]

2.5.2 (2020-02-28)

The ASDF Standard is at v1.4.0

• Add a developer overview document to help understand how ASDF works internally. Still a work in progress. [#730]
• Remove unnecessary dependency on six. [#739]
• Add developer documentation on schema versioning, additional schema and extension-related tests, and fix a variety of issues in AsdfType subclasses. [#750]
• Update asdf-standard to include schemas that were previously missing from 1.4.0 version maps. [#767]
• Simplify example in README.rst [#763]

2.5.1 (2020-01-07)

The ASDF Standard is at v1.4.0

• Fix bug in test causing failure when test suite is run against an installed asdf package. [#732]

2.5.0 (2019-12-23)

The ASDF Standard is at v1.4.0

• Added asdf-standard 1.4.0 to the list of supported versions. [#704]
• Fix load_schema LRU cache memory usage issue [#682]
• Add convenience method for fetching the default resolver [#682]
• SpecItem and Spec were deprecated in semantic_version and were replaced with SimpleSpec. [#715]
• Pinned the minimum required semantic_version to 2.8. [#715]
• Fix bug causing segfault after update of a memory-mapped file. [#716]

2.4.2 (2019-08-29)

The ASDF Standard is at v1.3.0

• Limit the version of semantic_version to <=2.6.0 to work around a Deprecation warning. [#700]

2.4.1 (2019-08-27)

The ASDF Standard is at v1.3.0

• Define the in operator for top-level AsdfFile objects. [#623]
• Overhaul packaging infrastructure. Remove use of astropy_helpers. [#670]
• Automatically register schema tester plugin. Do not enable schema tests by default. Add configuration setting and command line option to enable schema tests. [#676]
• Enable handling of subclasses of known custom types by using decorators for convenience. [#563]
• Add support for jsonschema 3.x. [#684]
• Fix bug in NDArrayType.__len__. It must be a method, not a property. [#673]

2.3.3 (2019-04-02)

The ASDF Standard is at v1.3.0

• Pass ignore_unrecognized_tag setting through to ASDF-in-FITS. [#650]
• Use $schema keyword if available to determine meta-schema to use when testing whether schemas themselves are valid. [#654]
• Take into account resolvers from installed extensions when loading schemas for validation. [#655]
• Fix compatibility issue with new release of pyyaml (version 5.1). [#662]
• Allow use of pathlib.Path objects for custom_schema option. [#663]

2.3.2 (2019-02-19)

The ASDF Standard is at v1.3.0

• Fix bug that occurs when comparing installed extension version with that found in file. [#641]

2.3.1 (2018-12-20)

The ASDF Standard is at v1.3.0

• Provide source information for AsdfDeprecationWarning that come from extensions from external packages. [#629]
• Ensure that top-level accesses to the tree outside a closed context handler result in an OSError. [#628]
• Fix the way generic_io handles URIs and paths on Windows. [#632]
• Fix bug in asdftool that prevented extract command from being visible. [#633]

2.3.0 (2018-11-28)

The ASDF Standard is at v1.3.0

• Storage of arbitrary precision integers is now provided by asdf.IntegerType. Reading a file with integer literals that are too large now causes only a warning instead of a validation error. This is to provide backwards compatibility for files that were created with a buggy version of ASDF (see #553 below). [#566]
• Remove WCS tags. These are now provided by the gwcs package. [#593]
• Deprecate the asdf.asdftypes module in favor of asdf.types. [#611]
• Support use of pathlib.Path with asdf.open and AsdfFile.write_to. [#617]
• Update ASDF Standard submodule to version 1.3.0.

2.2.1 (2018-11-15)

• Fix an issue with the README that caused sporadic installation failures and also prevented the long description from being rendered on pypi. [#607]

2.2.0 (2018-11-14)

• Add new parameter lazy_load to AsdfFile.open. It is True by default and preserves the default behavior. False detaches the loaded tree from the underlying file: all blocks are fully read and numpy arrays are materialized. Thus it becomes safe to close the file and continue using AsdfFile.tree. However, copy_arrays parameter is still effective and the active memory maps may still require the file to stay open in case copy_arrays is False. [#573]
• Add AsdfConversionWarning for failures to convert ASDF tree into custom types. This warning is converted to an error when using assert_roundtrip_tree for tests. [#583]
• Deprecate asdf.AsdfFile.open in favor of asdf.open. [#579]
• Add readonly protection to memory mapped arrays when the underlying file handle is readonly. [#579]

2.1.2 (2018-11-13)

• Make sure that all types corresponding to core tags are added to the type index before any others. This fixes a bug that was related to the way that subclass tags were overwritten by external extensions. [#598]

2.1.1 (2018-11-01)

• Make sure extension metadata is written even when constructing the ASDF tree on-the-fly. [#549]
• Fix large integer validation when storing numpy integer literals in the tree. [#553]
• Fix bug that caused subclass of external type to be serialized by the wrong tag. [#560]
• Fix bug that occurred when attempting to open invalid file but Astropy import fails while checking for ASDF-in-FITS. [#562]
• Fix bug that caused tree creation to fail when unable to locate a schema file for an unknown tag. This now simply causes a warning, and the offending node is converted to basic Python data structures. [#571]

2.1.0 (2018-09-25)

• Add API function for retrieving history entries. [#501]
• Store ASDF-in-FITS data inside a 1x1 BINTABLE HDU. [#519]
• Allow implicit conversion of namedtuple into serializable types. [#534]
• Fix bug that prevented use of ASDF-in-FITS with HDUs that have names with underscores. [#543]
• Add option to generic_io.get_file to close underlying file handle. [#544]
• Add top-level keys method to AsdfFile to access tree keys. [#545]

2.0.3 (2018-09-06)

• Update asdf-standard to reflect more stringent (and, consequently, more correct) requirements on the formatting of complex numbers. [#526]
• Fix bug with dangling file handle when using ASDF-in-FITS. [#533]
• Fix bug that prevented fortran-order arrays from being serialized properly. [#539]

2.0.2 (2018-07-27)

• Allow serialization of broadcasted numpy arrays. [#507]
• Fix bug that caused result of set_array_compression to be overwritten by all_array_compression argument to write_to. [#510]
• Add workaround for Python OSX write limit bug (see https://bugs.python.org/issue24658). [#521]
• Fix bug with custom schema validation when using out-of-line definitions in schema file. [#522]

2.0.1 (2018-05-08)

• Allow test suite to run even when package is not installed. [#502]

2.0.0 (2018-04-19)

• Astropy-specific tags have moved to Astropy core package. [#359]
• ICRSCoord tag has moved to Astropy core package. [#401]
• Remove support for Python 2. [#409]
• Create pytest plugin to be used for testing schema files. [#425]
• Add metadata about extensions used to create a file to the history section of the file itself. [#475]
• Remove hard dependency on Astropy. It is still required for testing, and for processing ASDF-in-FITS files. [#476]
• Add command for extracting ASDF extension from ASDF-in-FITS file and converting it to a pure ASDF file. [#477]
• Add command for removing ASDF extension from ASDF-in-FITS file. [#480]
• Add an ExternalArrayReference type for referencing arrays in external files. [#400]
• Improve the way URIs are detected for ASDF-in-FITS files in order to fix bug with reading gzipped ASDF-in-FITS files. [#416]
• Explicitly disallow access to entire tree for ASDF file objects that have been closed. [#407]
• Install and load extensions using setuptools entry points. [#384]
• Automatically initialize asdf-standard submodule in setup.py. [#398]
• Allow foreign tags to be resolved in schemas and files. Deprecate tag_to_schema_resolver property for AsdfFile and AsdfExtensionList. [#399]
• Fix bug that caused serialized FITS tables to be duplicated in embedded ASDF HDU. [#411]
• Create and use a new non-standard FITS extension instead of ImageHDU for storing ASDF files embedded in FITS. Explicitly remove support for the .update method of AsdfInFits, even though it didn't appear to be working previously. [#412]
• Allow package to be imported and used from source directory and builds in development mode. [#420]
• Add command to asdftool for querying installed extensions. [#418]
• Implement optional top-level validation pass using custom schema. This can be used to ensure that particular ASDF files follow custom conventions beyond those enforced by the standard. [#442]
• Remove restrictions affecting top-level attributes data, wcs, and fits. Bump top-level ASDF schema version to v1.1.0. [#444]

1.3.3 (2018-03-01)

• Update test infrastructure to rely on new Astropy v3.0 plugins. [#461]
• Disable use of 2to3. This was causing test failures on Debian builds. [#463]

1.3.2 (2018-02-22)

• Updates to allow this version of ASDF to be compatible with Astropy v3.0. [#450]
• Remove tests that are no longer relevant due to latest updates to Astropy's testing infrastructure. [#458]

1.3.1 (2017-11-02)

• Relax requirement on semantic_version version to 2.3.1. [#361]
• Fix bug when retrieving file format version from new ASDF file. [#365]
• Fix bug when duplicating inline arrays. [#370]
• Allow tag references using the tag URI scheme to be resolved in schema files. [#371]

1.3.0 (2017-10-24)

• Fixed a bug in reading data from an "http:" url. [#231]
• Implements v 1.1.0 of the asdf schemas. [#233]
• Added a function is_asdf_file which inspects the input and returns True or False. [#239]
• The open method of AsdfInFits now accepts URIs and open file handles in addition to HDULists. The open method of AsdfFile will now try to parse the given URI or file handle as AsdfInFits if it is not obviously a regular ASDF file. [#241]
• Updated WCS frame fields obsgeoloc and obsgeovel to reflect recent updates in astropy that changed representation from Quantity to CartesianRepresentation. Updated to reflect astropy change that combines galcen_ra and galcen_dec into galcen_coord. Added support for new field galcen_v_sun. Added support for required module versions for tag classes. [#244]
• Added support for lz4 compression algorithm [#258]. Also added support for using a different compression algorithm for writing out a file than the one that was used for reading the file (e.g. to convert blocks to use a different compression algorithm) [#257]
• Tag classes may now use an optional supported_versions attribute to declare exclusive support for particular versions of the corresponding schema. If this attribute is omitted (as it is for most existing tag classes), the tag is assumed to be compatible with all versions of the corresponding schema. If supported_versions is provided, the tag class implementation can include code that is conditioned on the schema version. If an incompatible schema is encountered, or if deserialization of the tagged object fails with an exception, a raw Python data structure will be returned. [#272]
• Added option to AsdfFile.open to allow suppression of warning messages when mismatched schema versions are encountered. [#294]
• Added a diff tool to asdftool to allow for visual comparison of pairs of ASDF files. [#286]
• Added command to asdftool to display available tags. [#303]
• When possible, display name of ASDF file that caused version mismatch warning. [#306]
• Issue a warning when an unrecognized tag is encountered. [#295] This warning is silenced by default, but can be enabled with a parameter to the AsdfFile constructor, or to AsdfFile.open. Also added an option for ignoring warnings from unrecognized schema tags. [#319]
• Fix bug with loading JSON schemas in Python 3.5. [#317]
• Remove all remnants of support for Python 2.6. [#333]
• Fix issues with the type index used for writing out ASDF files. This ensures that items in the type index are not inadvertently overwritten by later versions of the same type. It also makes sure that schema example tests run against the correct version of the ASDF standard. [#350]
• Update time schema to reflect changes in astropy. This fixes an outstanding bug. [#343]
• Add copy_arrays option to asdf.open to control whether or not underlying array data should be memory mapped, if possible. [#355]
• Allow the tree to be accessed using top-level __getitem__ and __setitem__. [#352]

1.2.1 (2016-11-07)

• Make asdf conditionally dependent on the version of astropy to allow running it with older versions of astropy. [#228]

1.2.0 (2016-10-04)

• Added Tabular model. [#214]
• Forced new blocks to be contiguous [#221]
• Rewrote code which tags complex objects [#223]
• Fixed version error message [#224]

1.0.5 (2016-06-28)

• Fixed a memory leak when reading wcs that grew memory to over 10 Gb. [#200]

1.0.4 (2016-05-25)

• Added wrapper class for astropy.core.Time, TaggedTime. [#198]

1.0.2 (2016-02-29)

• Renamed package to ASDF. [#190]
• Stopped support for Python 2.6 [#191]

1.0.1 (2016-01-08)

• Fixed installation from the source tarball on Python 3. [#187]
• Fixed error handling when opening ASDF files not supported by the current version of asdf. [#178]
• Fixed parse error that could occur sometimes when YAML data was read from a stream. [#183]

1.0.0 (2015-09-18)

• Initial release.