``unicode_data``
================

VivoMind Prolog Unicode Resources

Authors
-------

| Arun Majumdar @ VivoMind LLC
| Paulo Moura @ VivoMind LLC

License
-------

Creative Commons CC0 1.0 Universal (CC0 1.0) - Public Domain Dedication:

`http://creativecommons.org/publicdomain/zero/1.0/ <http://creativecommons.org/publicdomain/zero/1.0/>`__

We do appreciate acknowledgement if you use these resources, however,
and we also welcome contributions to improve them.

Website
-------

The latest release of the VivoMind Prolog Unicode Resources is available
at the URL:

`https://github.com/VivoMind <https://github.com/VivoMind>`__

At this address you can also find additional information about the
VivoMind Prolog Unicode Resources and submit your bug reports and
contributions.

Description
-----------

The VivoMind Prolog Unicode Resources are a set of files resulting from
the conversion of most (but not all) official UCD 6.1 files and updated
for the few changes in the 6.2 standard. The original files can be
downloaded from:

`http://www.unicode.org <http://www.unicode.org>`__

The conversion of the UCD files resulted in a large number of Prolog
tables and also a set of auxiliary predicates (described below) for
accessing these tables. Other than the obvious conversion in the
provided predicate names, no attempt was made to convert the identifiers
used for properties and other data.

Requirements
------------

Most of the auxiliary predicates assume that the de facto Prolog
standard predicate ``between/3`` is available. Unicode code point values
are represented using the ISO Prolog standard notation for hexadecimal
integers. In addition, the ISO Prolog standard directives ``include/1``
and ``ensure_loaded/1`` are used in some of the files to load auxiliary
files.

Usage
-----

Most applications only require some of the tables present in these
resources. Most of these tables define properties for ranges of code
points and not for single code points but the provided auxiliary
predicates allow access for a single code point. When increased
performance is required, consider using the existing tables and
auxiliary predicates to generated derived tables more fit for your
specific application.

Known issues
------------

In the file ``unicode_unihan_variant.pl``, when there's more than one
variant for a code point, only the first one (as listed in the original
UCD file) is returned.

The ``include/1`` and ``ensure_loaded/1`` directives are specified in
the ISO Prolog standard published in 1995. But some Prolog compilers
either don't implement one or both directives or have flawed
implementations. Thus, you may need to change how some of the files are
loaded depending on the chosen Prolog compiler. Using conditional
compilation directives would help in some cases but it would also rise
portability issues on their own.

Acknowledgements
----------------

We thank Richard O'Keefe for helpful suggestions to improve the
usability of these resources.

Files and API Summary
---------------------

The Prolog file names are derived from the original file names by
prefixing them with the ``unicode_`` string, converting to lower case,
and replacing the camel case spelling with underscores. There are,
however, two exceptions: the files and directories holding the code
point categories and names.

There's also an utility file, ``unicode_data.pl``, that can be used to
load all the files in these resources. Is mostly used to test
portability of the code across Prolog compilers. Also included is a
Logtalk version of this file, ``unicode_data.lgt``, that uses Logtalk's
own implementation of the ``include/1`` directive and the
``logtak_load/1`` predicate to load all files. This file can be used to
workaround Prolog systems with buggy or missing implementations of the
``ensure_loaded/1`` and ``include/1`` directives.

An overview of the original file names and the code point properties can
be found at:

| `http://www.unicode.org/reports/tr44/#Directory_Structure <http://www.unicode.org/reports/tr44/#Directory_Structure>`__
| `http://www.unicode.org/reports/tr44/#Property_Definitions <http://www.unicode.org/reports/tr44/#Property_Definitions>`__

``unicode_arabic_shaping.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_arabic_shaping/4``
-  Dependencies:
   (none)

``unicode_bidi_mirroring.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_bidi_mirroring/2``
-  Dependencies:
   (none)

``unicode_blocks.pl``
^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_block/2-3``
-  Dependencies:
   (none)

``unicode_case_folding.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_case_folding/3``
-  Dependencies:
   (none)

``unicode_categories.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_category/2``
-  Dependencies:
   files in the ``unicode_categories`` directory

``unicode_cjk_radicals.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_cjk_radical/3``
-  Dependencies:
   (none)

``unicode_composition_exclusions.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_composition_exclusion/1``
-  Dependencies:
   (none)

``unicode_core_properties.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_math/1-2``
   ``unicode_alphabetic/1-2``
   ``unicode_range_alphabetic/2``
   ``unicode_lowercase/1-2``
   ``unicode_uppercase/1-2``
   ``unicode_cased/1-2``
   ``unicode_case_ignorable/1-2``
   ``unicode_changes_when_lowercased/1-2``
   ``unicode_changes_when_uppercased/1-2``
   ``unicode_changes_when_titlecased/1-2``
   ``unicode_changes_when_casefolded/1-2``
   ``unicode_changes_when_casemapped/1-2``
   ``unicode_id_start/1-2``
   ``unicode_id_continue/1-2``
   ``unicode_xid_start/1-2``
   ``unicode_xid_continue/1-2``
   ``unicode_default_ignorable/1-2``
   ``unicode_grapheme_extend/1-2``
   ``unicode_grapheme_base/1-2``
   ``unicode_grapheme_link/1-2``
-  Dependencies:
   files in the ``unicode_core_properties`` directory

``unicode_decomposition_type.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_canonical/1-2``
   ``unicode_compat/1-2``
   ``unicode_font/1-2``
   ``unicode_nobreak/1-2``
   ``unicode_initial/1-2``
   ``unicode_medial/1-2``
   ``unicode_final/1-2``
   ``unicode_isolated/1-2``
   ``unicode_circle/1-2``
   ``unicode_super/1-2``
   ``unicode_sub/1-2``
   ``unicode_vertical/1-2``
   ``unicode_wide/1-2``
   ``unicode_narrow/1-2``
   ``unicode_small/1-2``
   ``unicode_square/1-2``
   ``unicode_fraction/1-2``
-  Dependencies:
   files in the ``unicode_decomposition_type`` directory

``unicode_derived_age.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_age/2-3``
-  Dependencies:
   (none)

``unicode_derived_bidi_class.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides: ``unicode_bidi_class/2-3``
-  Dependencies: (none)

``unicode_derived_combining_class.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_combining_class/2-3``
-  Dependencies:
   (none)

``unicode_derived_core_properties.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_core_property/2-3``
-  Dependencies:
   (none)

``unicode_derived_decomposition_type.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_decomposition_type/2-3``
-  Dependencies:
   (none)

``unicode_derived_east_asian_width.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_east_asian_width/2-3``
-  Dependencies:
   (none)

``unicode_derived_joining_group.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_joining_group/2-3``
-  Dependencies:
   (none)

``unicode_derived_joining_type.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_joining_type/2-3``
-  Dependencies:
   (none)

``unicode_derived_line_break.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_line_break/2-3``
-  Dependencies:
   (none)

``unicode_derived_normalization_props.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_fc_nfkc/2``
   ``unicode_nfkc_cf/2``
   ``unicode_full_composition_exclusion/1-2``
   ``unicode_nfd_qc_no/1-2``
   ``unicode_nfc_qc_no/1-2``
   ``unicode_nfc_qc_maybe/1-2``
   ``unicode_nfkd_qc_no/1-2``
   ``unicode_nfkc_qc_no/1-2``
   ``unicode_nfkc_qc_maybe/1-2``
   ``unicode_expands_on_nfd/1-2``
   ``unicode_expands_on_nfc/1-2``
   ``unicode_expands_on_nfkd/1-2``
   ``unicode_expands_on_nfkc/1-2``
   ``unicode_changes_when_nfkc_casefolded/1-2``
-  Dependencies:
   files in the ``unicode_derived_normalization_props`` directory

``unicode_derived_numeric_type.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_numeric_type/2-3``
-  Dependencies:
   (none)

``unicode_derived_numeric_values.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_numerical_value/3``
-  Dependencies:
   (none)

``unicode_hangul_syllable_type.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_hangul_syllable_type/2-3``
-  Dependencies:
   (none)

``unicode_indic_matra_category.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_indic_matra_category/2-3``
-  Dependencies:
   (none)

``unicode_indic_syllabic_category.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_indic_syllabic_category/2-3``
-  Dependencies:
   (none)

``unicode_jamo.pl``
^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_jamo/2``
-  Dependencies:
   (none)

``unicode_name_aliases.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_name_alias/3``
-  Dependencies:
   (none)

``unicode_names.pl``
^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_name/2``
-  Dependencies:
   files in the ``unicode_names`` directory

``unicode_prop_list.pl``
^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_white_space/1-2``
   ``unicode_bidi_control/1-2``
   ``unicode_join_control/1-2``
   ``unicode_dash/1-2``
   ``unicode_hyphen/1-2``
   ``unicode_quotation_mark/1-2``
   ``unicode_terminal_punctuation/1-2``
   ``unicode_other_math/1-2``
   ``unicode_hex_digit/1-2``
   ``unicode_ascii_hex_digit/1-2``
   ``unicode_other_alphabetic/1-2``
   ``unicode_ideographic/1-2``
   ``unicode_diacritic/1-2``
   ``unicode_extender/1-2``
   ``unicode_other_lowercase/1-2``
   ``unicode_other_uppercase/1-2``
   ``unicode_noncharacter_code_point/1-2``
   ``unicode_other_grapheme_extend/1-2``
   ``unicode_ids_binary_operator/1-2``
   ``unicode_ids_trinary_operator/1-2``
   ``unicode_radical/1-2``
   ``unicode_unified_ideograph/1-2``
   ``unicode_other_default_ignorable/1-2``
   ``unicode_deprecated/1-2``
   ``unicode_soft_dotted/1-2``
   ``unicode_logical_order_exception/1-2``
   ``unicode_other_id_start/1-2``
   ``unicode_other_id_continue/1-2``
   ``unicode_sterm/1-2``
   ``unicode_variation_selector/1-2``
   ``unicode_pattern_white_space/1-2``
   ``unicode_pattern_syntax/1-2``
-  Dependencies:
   files in the ``unicode_prop_list`` directory

``unicode_range_scripts.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_range_script/3``
   ``unicode_script/2``
-  Dependencies:
   (none)

``unicode_script_extensions.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_script_extension/2-3``
-  Dependencies:
   ``unicode_scripts.pl``

``unicode_scripts.pl``
^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_script/6``
   ``unicode_script_category/3``
-  Dependencies:
   (none)

``unicode_special_casing.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_special_casing/5``
-  Dependencies:
   (none)

``unicode_unihan_variants.pl``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_unihan_variant/2-3``
-  Dependencies:
   (none)

``unicode_version.pl``
^^^^^^^^^^^^^^^^^^^^^^

-  Provides:
   ``unicode_version/3``
-  Dependencies:
   (none)
