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https://github.com/HDFGroup/hdf5.git
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[svn-r2986] Purpose:
Corrections & updates Description: Updated and corrected DDL description & examples to include all the current features for the v1.4 release. Lots of changes... Platforms tested: Netscape 4.76
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@ -85,38 +85,36 @@ This section contains a brief explanation of the symbols used in the DDL.
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<super_block_content> ::= TBD
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<root_group> ::= GROUP "/" { <unamed_datatype>* <object_id><FONT SIZE=1.7>opt</FONT> <group_attribute>* <group_member>* }
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<root_group> ::= GROUP "/" { <unamed_datatype>* <object_id><FONT SIZE=1.7>opt</FONT>
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<group_attribute>* <group_member>* }
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<unamed_datatype> ::= DATATYPE <unamed_type_name> { <compound_type> }
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<datatype> ::= <atomic_type> | <compound_type> | <variable_length_type> |
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<array_type>
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<unamed_datatype> ::= DATATYPE <unamed_type_name> { <datatype> }
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<unamed_type_name> ::= the assigned name for unamed type is in the form of
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#oid1:oid2, where oid1 and oid2 are the object ids of the type
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#oid1:oid2, where oid1 and oid2 are the object ids of the type
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<variable_length_type> ::= H5T_VLEN of <atomic_type>
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<atomic_type> ::= <integer> | <float> | <time> | <string> | <bitfield> |
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<opaque> | <reference> | <enum>
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<compound_type> ::= <member_type_def>+
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<integer> ::= H5T_STD_I8BE | H5T_STD_I8LE | H5T_STD_I16BE |
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H5T_STD_I16LE | H5T_STD_I32BE | H5T_STD_I32LE | H5T_STD_I64BE |
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H5T_STD_I64LE | H5T_STD_U8BE | H5T_STD_U8LE | H5T_STD_U16BE |
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H5T_STD_U16LE | H5T_STD_U32BE | H5T_STD_U32LE | H5T_STD_U64BE |
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H5T_STD_U64LE | H5T_NATIVE_CHAR | H5T_NATIVE_UCHAR |
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H5T_NATIVE_SHORT | H5T_NATIVE_USHORT | H5T_NATIVE_INT |
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H5T_NATIVE_UINT | H5T_NATIVE_LONG | H5T_NATIVE_ULONG |
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H5T_NATIVE_LLONG | H5T_NATIVE_ULLONG
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<member_type_def> ::= <scalar_type_def> | <array_type_def>
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<scalar_type_def> ::= <atomic_type> <field_name> ;
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<atomic_type> ::= <integer> | <float> | <time> | <string> | <bitfield> | <opaque> |
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<reference> | <enum>
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<integer> ::= H5T_STD_I8BE | H5T_STD_I8LE | H5T_STD_I16BE | H5T_STD_I16LE | H5T_STD_I32BE |
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H5T_STD_I32LE | H5T_STD_I64BE | H5T_STD_I64LE | H5T_STD_U8BE |
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H5T_STD_U8LE | H5T_STD_U16BE | H5T_STD_U16LE | H5T_STD_U32BE |
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H5T_STD_U32LE | H5T_STD_U64BE | H5T_STD_U64LE | H5T_NATIVE_CHAR |
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H5T_NATIVE_UCHAR | H5T_NATIVE_SHORT | H5T_NATIVE_USHORT |
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H5T_NATIVE_INT | H5T_NATIVE_UINT | H5T_NATIVE_LONG | H5T_NATIVE_ULONG |
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H5T_NATIVE_LLONG | H5T_NATIVE_ULLONG
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<float> ::= H5T_IEEE_F32BE | H5T_IEEE_F32LE | H5T_IEEE_F64BE | H5T_IEEE_F64LE |
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H5T_NATIVE_FLOAT | H5T_NATIVE_DOUBLE | H5T_NATIVE_LDOUBLE
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<float> ::= H5T_IEEE_F32BE | H5T_IEEE_F32LE | H5T_IEEE_F64BE |
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H5T_IEEE_F64LE | H5T_NATIVE_FLOAT | H5T_NATIVE_DOUBLE |
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H5T_NATIVE_LDOUBLE
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<time> ::= TBD
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<string> ::= { STRSIZE <strsize> ;
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<string> ::= H5T_STRING { STRSIZE <strsize> ;
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STRPAD <strpad> ;
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CSET <cset> ;
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CTYPE <ctype> ; }
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@ -131,32 +129,38 @@ This section contains a brief explanation of the symbols used in the DDL.
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<bitfield> ::= TBD
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<opaque> ::= { H5T_OPAQUE; OPAQUE_TAG <identifier>; }
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<opaque> ::= H5T_OPAQUE { <identifier> }
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<reference> ::= H5T_REFERENCE
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<reference> ::= H5T_REFERENCE { <ref_type> }
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<ref_type> ::= H5T_STD_REF_OBJECT | H5T_STD_REF_DSETREG
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<compound_type> ::= H5T_COMPOUND { <member_type_def>+ }
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<member_type_def> ::= <datatype> <field_name> ;
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<field_name> ::= <identifier>
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<array_type_def> ::= <atomic_type> <field_name> <dim_sizes> ;
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<variable_length_type> ::= H5T_VLEN { <datatype> }
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<dim_sizes> ::= [dimsize1][dimsize2]..., where dimsize1, dimsize2 are integers
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<array_type> ::= H5T_ARRAY { <dim_sizes> <datatype> }
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<group_attribute> ::= <attribute>
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<dim_sizes> ::= [dimsize1][dimsize2]...
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// where dimsize1, dimsize2 are integers
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<attribute> ::= ATTRIBUTE <attr_name> { <datatype>
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<dataspace>
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<object_id><FONT SIZE=1.7>opt</FONT>
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<attribute> ::= ATTRIBUTE <attr_name> { <dataset_type>
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<dataset_space>
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<data><FONT SIZE=1.7>opt</FONT> }
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// <datatype> and <dataspace> must appear before <data>.
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<attr_name> ::= <identifier>
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<datatype> ::= DATATYPE { <atomic_type> } |
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DATATYPE { <compound_type> } |
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DATATYPE { <variable_length_type> } |
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DATATYPE { <named_type> }
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<dataset_type> ::= DATATYPE <path_name> | <datatype>
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<enum> ::= H5T_ENUM { <integer>; <enum_def>+ }
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<enum> ::= H5T_ENUM { <enum_base_type> <enum_def>+ }
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<enum_base_type> ::= <integer>
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// Currently enums can only hold integer type data, but they may be expanded
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// in the future to hold any datatype
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<enum_def> ::= <enum_symbol> <enum_val>;
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@ -164,32 +168,39 @@ This section contains a brief explanation of the symbols used in the DDL.
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<enum_val> ::= an integer;
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<named_type> ::= <path_name>
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<path_name> ::= <path_part>+
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<path_name> ::= <identifier>
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<path_part> ::= /<identifier>
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<dataspace> ::= DATASPACE { SCALAR } |
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DATASPACE { SIMPLE <current_dims> / <max_dims> } |
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DATASPACE { COMPLEX <ds_definition>+ } |
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DATASPACE { <dataspace_name> }
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<dataspace> ::= <scalar_space> | <simple_space> | <complex_space>
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<scalar_space> ::= SCALAR
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<simple_space> ::= SIMPLE { <current_dims> / <max_dims> }
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<complex_space> ::= COMPLEX { <complex_space_definition> }
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<dataset_space> ::= DATASPACE <path_name> | <dataspace>
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<current_dims> ::= (<i>i<FONT SIZE=1.0>1</i></FONT>, <i>i<FONT SIZE=1.0>2</i></FONT>, ... ), where <i>i<FONT SIZE=1.0>k</i></FONT> is an integer, <i>k</i> = 1,2,...
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<max_dims> ::= (<i>i<FONT SIZE=1.0>1</i></FONT>, <i>i<FONT SIZE=1.0>2</i></FONT>, ... ) where <i>i<FONT SIZE=1.0>k</i></FONT> is an integer or H5S_UNLIMITED
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<ds_definition> ::= TBD
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<complex_space_definition> ::= TBD
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<dataspace_name> ::= <identifier>
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<data> ::= DATA { <scalar_space_data> |
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<simple_space_data> |
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<complex_space_data> |
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<variable_length_space_data> }
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<data> ::= DATA { <scalar_space_data> | <simple_space_data> |
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<complex_space_data> }
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<scalar_space_data> ::= <atomic_scalar_data> | <compound_scalar_data>
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<scalar_space_data> ::= <any_element>
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<atomic_scalar_data> :: = <integer_data> | <float_data> | <time_data> | <string_data> |
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<bitfield_data> | <opaque_data> | <enum_data> | <reference_data>
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<any_element> ::= <atomic_element> | <compound_element> |
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<variable_length_element> | <array_element>
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<any_data_seq> ::= <any_element> | <any_element>, <any_data_seq>
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<atomic_element> :: = <integer_data> | <float_data> | <time_data> |
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<string_data> | <bitfield_data> | <opaque_data> |
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<enum_data> | <reference_data>
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<integer_data> ::= an integer
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@ -199,14 +210,14 @@ This section contains a brief explanation of the symbols used in the DDL.
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<string_data> ::= a string
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// A string is enclosed in double quotes.
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// If a string is displayed on more than one line, string concatenate operator '//'is used.
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// If a string is displayed on more than one line, string concatenate
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// operator '//'is used.
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<bitfield_data> ::= TBD
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<opaque_data> ::= TBD
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<enum_data> ::= <enum_symbol>
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//maybe will be <enum_symbol> in the future
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<reference_data> ::= <object_ref_data> | <data_region_data> | NULL
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@ -218,12 +229,13 @@ This section contains a brief explanation of the symbols used in the DDL.
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<object_num> ::= an integer:an integer | an integer
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<data_region_data> ::= H5T_STD_REF_DSETREG <object_num> {<data_region_data_info>,
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<data_region_data_info>, ...}
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<data_region_data> ::= H5T_STD_REF_DSETREG <object_num>
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{ <data_region_data_info>, <data_region_data_info>, ...}
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<data_region_data_info> ::= <region_info> | <point_info>
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<region_info> ::= (<lower_bound>:<upper_bound>, <lower_bound>:<upper_bound>, ...)
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<region_info> ::= (<lower_bound>:<upper_bound>,
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<lower_bound>:<upper_bound>, ...)
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<lower_bound> ::= an integer
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@ -231,50 +243,45 @@ This section contains a brief explanation of the symbols used in the DDL.
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<point_info> ::= (an integer, an integer, ...)
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<compound_scalar_data> ::= { [ <member_data> ], [ <member_data> ], ... }
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<compound_element> ::= { <any_data_seq> }
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<member_data> ::= <atomic_scalar_data> | <atomic_simple_data>
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<atomic_simple_data> :: = <atomic_element>, <atomic_simple_data> |
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<atomic_element>
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<atomic_simple_data> :: = <atomic_element>, <atomic_simple_data> | <atomic_element>
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<simple_space_data> :: = <any_data_seq>
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<atomic_element> ::= <atomic_scalar_data>
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<variable_length_element> ::= ( <any_data_seq> )
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<simple_space_data> :: = <atomic_simple_data> | <compound_simple_data>
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<variable_length_space_data> ::= <atomic_simple_data>
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<compound_simple_data> ::= <compoud_element>, <compound_element>, ...
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<compound_element> ::= <compound_scalar_data>
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<array_element> ::= [ <any_data_seq> ]
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<complex_space_data> ::= TBD
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<group_member> ::= <named_datatype> | <named_dataspace> | <group> | <dataset> |
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<softlink>
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<named_datatype> ::= DATATYPE <type_name> { <compound_type> }
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<named_datatype> ::= DATATYPE <type_name> { <datatype> }
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<type_name> ::= <identifier>
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<named_dataspace> ::= TBD
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<group> ::= GROUP <group_name> { <hardlink> } |
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GROUP <object_id><FONT SIZE=1.7>opt</FONT> <group_name> { <group_attribute>* <group_member>* }
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<hardlink> ::= HARDLINK <path_name>
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<group> ::= GROUP <group_name> { <hardlink> | <group_info> }
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<group_name> ::= <identifier>
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<hardlink> ::= HARDLINK <path_name>
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<group_info> ::= <group_attribute>* <group_member>*
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<group_attribute> ::= <attribute>
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<dataset> ::= DATASET <dataset_name> { <hardlink> } |
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DATASET <dataset_name> { <datatype>
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<dataspace>
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<storagelayout><FONT SIZE=1.7>opt</FONT>
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<compression><FONT SIZE=1.7>opt</FONT>
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<dataset_attribute>*
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<object_id><FONT SIZE=1.7>opt</FONT>
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<data><FONT SIZE=1.7>opt</FONT> }
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// Tokens within {} can be in any order as long as <data> and <dataset_attribute>
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// are after <datatype> and <dataspace>.
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<group_member> ::= <named_datatype> | <named_dataspace> | <group> |
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<dataset> | <softlink>
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<dataset> ::= DATASET <dataset_name> { <hardlink> | <dataset_info> }
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<dataset_info> ::= <dataset_type> <dataset_space> <storagelayout><FONT SIZE=1.7>opt</FONT>
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<compression><FONT SIZE=1.7>opt</FONT> <dataset_attribute>* <object_id><FONT SIZE=1.7>opt</FONT>
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<data><FONT SIZE=1.7>opt</FONT>
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// Tokens above can be in any order as long as <data> is
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// after <dataset_type> and <dataset_space>.
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<dataset_name> ::= <identifier>
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@ -323,21 +330,20 @@ This section contains a brief explanation of the symbols used in the DDL.
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HDF5 "example.h5" {
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GROUP "/" {
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ATTRIBUTE "attr1" {
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DATATYPE {
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{ STRSIZE 17;
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DATATYPE H5T_STRING {
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STRSIZE 17;
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STRPAD H5T_STR_NULLTERM;
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CSET H5T_CSET_ASCII;
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CTYPE H5T_C_S1;
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}
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}
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DATASPACE { SCALAR }
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DATASPACE SCALAR
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DATA {
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"string attribute"
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}
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}
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DATASET "dset1" {
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DATATYPE { H5T_STD_I32BE }
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DATASPACE { SIMPLE ( 10, 10 ) / ( 10, 10 ) }
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DATATYPE H5T_STD_I32BE
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DATASPACE SIMPLE { ( 10, 10 ) / ( 10, 10 ) }
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DATA {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
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@ -352,46 +358,44 @@ GROUP "/" {
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}
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}
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DATASET "dset2" {
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DATATYPE {
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DATATYPE H5T_COMPOUND {
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H5T_STD_I32BE "a";
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H5T_IEEE_F32BE "b";
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H5T_IEEE_F64BE "c";
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}
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DATASPACE { SIMPLE ( 5 ) / ( 5 ) }
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DATASPACE SIMPLE { ( 5 ) / ( 5 ) }
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DATA {
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{
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[ 1 ],
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[ 0.1 ],
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[ 0.01 ]
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1,
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0.1,
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0.01
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},
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{
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[ 2 ],
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[ 0.2 ],
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[ 0.02 ]
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2,
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0.2,
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0.02
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},
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{
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[ 3 ],
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[ 0.3 ],
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[ 0.03 ]
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3,
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0.3,
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0.03
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},
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{
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[ 4 ],
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[ 0.4 ],
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[ 0.04 ]
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4,
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0.4,
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0.04
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},
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{
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[ 5 ],
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[ 0.5 ],
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[ 0.05 ]
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5,
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0.5,
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0.05
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}
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}
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}
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GROUP "group1" {
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DATASET "dset3" {
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DATATYPE {
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"/type1"
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}
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DATASPACE { SIMPLE ( 5 ) / ( 5 ) }
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DATATYPE "/type1"
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DATASPACE SIMPLE { ( 5 ) / ( 5 ) }
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DATA {
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{
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[ 0, 1, 2, 3 ],
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@ -437,13 +441,10 @@ GROUP "/" {
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}
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}
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DATASET "dset3" {
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DATATYPE { H5T_VLEN of H5T_STD_I32LE }
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DATASPACE { SIMPLE ( 4 ) / ( 4 ) }
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DATATYPE H5T_VLEN { H5T_STD_I32LE }
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DATASPACE SIMPLE { ( 4 ) / ( 4 ) }
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DATA {
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0
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10, 11
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20, 21, 22
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30, 31, 32, 33
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(0), (10, 11), (20, 21, 22), (30, 31, 32, 33)
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}
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}
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GROUP "group2" {
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@ -452,9 +453,9 @@ GROUP "/" {
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SOFTLINK "slink1" {
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LINKTARGET "somevalue"
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}
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DATATYPE "type1" {
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H5T_STD_I32BE "a"[4];
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H5T_IEEE_F32BE "b"[5][6];
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DATATYPE "type1" H5T_COMPOUND {
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H5T_ARRAY { [4] H5T_STD_I32BE } "a";
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H5T_ARRAY { [5][6] H5T_IEEE_F32BE } "b";
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}
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}
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}
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