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02_Structures.md

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 # Structures
 
 - [Structures](#structures)
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     -  A [CDS entity](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abencds_entity_glosry.htm) such as a [CDS view](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abencds_view_glosry.htm) also represents a structured data type and can be used as such in ABAP programs (but not in the ABAP Dictionary). The same applies to [DDIC views](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenddic_view_glosry.htm) that are only available in [Standard ABAP](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenstandard_abap_glosry.htm).
     - Structures and structured data types can also be defined in the public [visibility section](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenvisibility_section_glosry.htm) of [global classes](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenglobal_class_glosry.htm) or in [global interfaces](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenglobal_interface_glosry.htm) and then used globally.
 
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 ## Creating Structures and Structured Types
 
 The typical language elements for creating structures and structured types locally in an ABAP program are [`BEGIN OF ... END OF ...`](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abaptypes_struc.htm). They are used in combination with the [`TYPES`](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abaptypes.htm) keyword to create a structured type and the [`DATA`](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abapdata.htm) keyword to create a structure.
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 ENDLOOP.
 ```
 
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 ## Variants of Structures
 
 Depending on the component type, the structure can be a [flat structure](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenflat_structure_glosry.htm "Glossary Entry"),
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 >- [Work areas](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenwork_area_glosry.htm) of ABAP SQL statements cannot contain any deep components other than strings among others.
 >- Especially for assignments and comparisons of deep structures, the compatibility of the source and target structure must be taken into account.
 
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 ## Accessing (Components of) Structures
 
 - Structures can be accessed as a whole. You can also address the individual components of structures at the appropriate operand positions. 
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 > **💡 Note**<br>
 > The [`ASSIGN`](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abapassign_dynamic_components.htm) statement has special variants for dynamically accessing structure components.
 
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 ## Populating Structures 
 
 You can copy the content of a structure to another using the [assignment operator](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenassignment_operator_glosry.htm) `=`. 
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 address-city   = `349875 Botanica`.
 ```
 
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 ### Using the VALUE Operator
 
 - The [`VALUE`](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenconstructor_expression_value.htm) operator can be used to construct the content of complex data objects such as structures or internal tables. 
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                                   nested_2 = VALUE #( d = 4 e = 5 ) ).
 ```
 
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 ### Using the CORRESPONDING Operator and MOVE-CORRESPONDING Statements
 
 - You can use statements with [`MOVE-CORRESPONDING`](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abapmove-corresponding.htm)
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 diff_deep_struc = CORRESPONDING #( DEEP APPENDING BASE ( diff_struc ) deep_struc ).
 ```
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 ## Clearing Structures
 You can reset individual components to their initial values and clear the
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 struc = VALUE #( ). 
 ```
 
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 ## Processing Structures
 Structures are primarily used to process data from tables. In this context, structures often take on the role of a [work area](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenwork_area_glosry.htm "Glossary Entry"). 
 The following code snippets cover only a selection. For more examples, see the cheat sheets about internal tables and ABAP SQL. 
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 MODIFY TABLE itab FROM struc.
 ```
 
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 ## Excursion: Including Structures
 
 - Although their use is not recommended in the ABAP programming
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 TYPES END OF address_type.
 ```
 
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 ## Executable Example
 [zcl_demo_abap_structures](./src/zcl_demo_abap_structures.clas.abap)