Properties of the "Criteria" type (boolean) control the synchronization of element properties. A formula can be used in this property, for example, to disable synchronization for elements on a specific layer. Disabling synchronization may be necessary to improve performance or to allow manual property input.

Command	Description
Sync_flag	A flag property to disable element synchronization. Type: Criteria. Can be calculated by a formula.
Sync_class_flag	Flag to enable classification processing (v1.72+). If not found, Sync_flag is used. Other functions remain operational.
Sync_correct_flag	Flag to disable coordinate accuracy verification (v1.72+). If not found, Sync_flag is used. Other functions remain operational.

Sync_from - reads values FROM another location and writes TO the current property. Sync_to - writes the value of the current property to another location (property, object parameter, project info). A property description can contain multiple Sync_from commands; the first value found will be written.

Command	Description
Sync_from	Reads values from a source and writes them to the current property
Sync_to	Writes the value of the current property to the target location
Reading Data (Sync_from)
Sync_from{PARAMETER_NAME}	Copies the value of a GDL parameter to the property (parameter name in Latin script)
Sync_from{PARAMETER_NAME; IGNORED_VALUES}	Copies the value of a GDL parameter, excluding specified values
Sync_from{description:PARAMETER_DESCRIPTION}	Copies the value based on the displayed parameter name (supports Cyrillic)
Sync_from{description:PARAMETER_DESCRIPTION; IGNORED_VALUES}	Copies the value based on the displayed name, excluding specified values
Sync_from{Property:GROUP/PROPERTY}	Copies the value from another property
Sync_from{Property:GROUP/PROPERTY; IGNORED_VALUES}	Copies the value from another property, excluding specified values
Sync_from{IFC:PROPERTY_NAME}	Copies the value of an IFC property
Writing Data (Sync_to)
Sync_to{id}	Writes the property value to the Element ID (does not work in AC22)
Sync_to{PARAMETER_NAME}	Writes the property value to a GDL parameter of the element (v1.6+)

• empty - Ignore empty (for strings) and zero (for numbers) values
• trim_empty - Ignore values consisting only of spaces (for strings) and zero (for numbers)
• def - Reset the property to its default value if no suitable values for writing are found

Command	Description
Sync_from{ИМЯ_ПАРАМЕТРА; uniq}	Returns unique values from the array (for text) or the sum (for numbers)
Sync_from{ИМЯ_ПАРАМЕТРА; sum}	Returns concatenated values from the array (for text) or the sum (for numbers)
Sync_from{ИМЯ_ПАРАМЕТРА; max}	Returns the maximum value from the array
Sync_from{ИМЯ_ПАРАМЕТРА; min}	Returns the minimum value from the array

If it is necessary to specify a reading range for arrays, the row values are specified first, followed by the column values, in the format (FIRST_ROW, LAST_ROW)(FIRST_COLUMN, LAST_COLUMN). For example, the entry Sync_from{ИМЯ_ПАРАМЕТРА; uniq(1,3)} will output unique values located within the range from the first to the third row inclusive. GDL object parameters can also be used when defining the range, for example Sync_from{ИМЯ_ПАРАМЕТРА; uniq(1,nrow)}

Processes the following element types: Window, Door, Wall, Beam, Column, Object, Zone. For curtain wall panels, returns the panel center (x, y, z); for columns or objects - the column/object center (x, y) and bottom elevation (z); for zones - the zone center (x, y, no elevation, z is always 0).

Command	Description
Read Coordinates
Sync_from{symb_pos_x}, Sync_from{symb_pos_y}, Sync_from{symb_pos_z}	Base coordinates of the element (for walls/beams - the start point)
Sync_from{Coord:symb_pos_sx}, Sync_from{Coord:symb_pos_sy}	Start coordinates of the element (for walls/beams)
Sync_from{Coord:symb_pos_ex}, Sync_from{Coord:symb_pos_ey}	End coordinates of the element (for walls/beams)
Sync_from{Coord:symb_pos_sx}, Sync_from{Coord:symb_pos_sy}	Absolute coordinates of the opening center (v1.74, windows/doors)
Sync_from{Coord:symb_pos_lo_x}, Sync_from{Coord:symb_pos_lo_y}, Sync_from{Coord:symb_pos_lo_z}	Coordinates relative to the user-defined origin (v1.73+)
Sync_from{Coord:symb_pos_lo_sx}, Sync_from{Coord:symb_pos_lo_sy}	Element start relative to the user-defined origin (v1.73+, walls/beams)
Sync_from{Coord:symb_pos_lo_ex}, Sync_from{Coord:symb_pos_lo_ey}	Element end relative to the user-defined origin (v1.73+, walls/beams)
Sync_from{Coord:symb_pos_lo_sx}, Sync_from{Coord:symb_pos_lo_sy}	Opening center coordinates relative to the user-defined origin (v1.74+)
Sync_from{Coord:symb_pos_sp_x}, Sync_from{Coord:symb_pos_sp_y}, Sync_from{Coord:symb_pos_sp_z}	Coordinates relative to the project location point (SurveyPoint) (v1.77+)
Sync_from{Coord:symb_pos_sp_sx}, Sync_from{Coord:symb_pos_sp_sy}	Element start relative to the project location point (v1.77+, walls/beams)
Sync_from{Coord:symb_pos_sp_ex}, Sync_from{Coord:symb_pos_sp_ey}	Element end relative to the project location point (v1.77+, walls/beams)
Angles and Orientation
Sync_from{Coord:symb_rotangle}	Rotation angle of the element (for columns: sum of axis and slant angles)
Sync_from{Coord:symb_rotangle_slant}	Slant rotation angle of a column (v1.74+)
Sync_from{Coord:symb_rotangle_axis}	Cross-section rotation angle of a column (v1.74+)
Sync_from{Coord:symb_rotangle_mod...}	Integer division of the angle (mod5, mod10, etc.)
Sync_from{Coord:north_dir}	Angle between the element and project north
Sync_from{Coord:north_dir_str}	Cardinal orientation (string) (v1.69+)
Sync_from{Coord:north_dir_eng}	Cardinal orientation (English) (v1.70+)
Write Coordinates
Sync_to{Coord:symb_pos_x}, Sync_to{Coord:symb_pos_y}, Sync_to{Coord:symb_pos_z}	Write element coordinates (v1.72+, objects/columns)
Sync_to{Coord:symb_pos_sx}, Sync_to{Coord:symb_pos_sy}	Write start coordinates (v1.72+, walls/beams)
Sync_to{Coord:symb_pos_ex}, Sync_to{Coord:symb_pos_ey}	Write end coordinates (v1.72+, walls/beams)
Sync_to{Coord:symb_rotangle}	Write rotation angle (v1.72)
Special Functions
Sync_from{Coord:locorigin_x}, Sync_from{Coord:locorigin_y}, Sync_from{Coord:locorigin_z}	User-defined origin coordinates (v1.73)
Sync_from{Coord:windoor_in_wall}	Check if an opening is placed in a wall (v1.74+, False = not in a wall)
Sync_from{Coord:locOrigin_x}, Sync_from{Coord:locOrigin_y}, Sync_from{Coord:locOrigin_z}	User-defined origin coordinates
Sync_from{Coord:offsetOrigin_x}, Sync_from{Coord:offsetOrigin_y}	This function returns the offset of the virtual coordinate system origin relative to the world coordinate system origin. The offset is set when the file is opened if the model's "weight point" is sufficiently far from the world origin. Once set, all coordinates obtained via the API are measured from this virtual origin.

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The functions return TRUE if the fractional part is absent and FALSE if the fractional part exceeds the tolerance.

Tolerances are 0.001 mm for coordinates and length, and 0.00001 degrees for angles.

Coordinate checking can be disabled in two ways: by disabling synchronization completely (by setting the flag property value to FALSE), or by creating a boolean property with the description Sync_correct_flag and setting it to FALSE. In this case, only the fractional part check for this specific element will be disabled; the rest of the synchronization will continue to work.

Command	Description
Basic Checks
Sync_from{Coord:symb_pos_correct}	General check of start/end points in X/Y (returns FALSE if a fractional part exists in one of the coordinates)
Sync_from{Coord:symb_pos_x_correct}, Sync_from{Coord:symb_pos_y_correct}	X/Y coordinate check
Sync_from{Coord:symb_pos_sx_correct}, Sync_from{Coord:symb_pos_sy_correct}	Element start point check (wall/beam)
Sync_from{Coord:symb_pos_ex_correct}, Sync_from{Coord:symb_pos_ey_correct}	Element end point check (wall/beam)
Sync_from{Coord:symb_rotangle_fraction}	Rotation angle fractional part
Sync_from{Coord:symb_rotangle_correct}	Rotation angle fractional part check (tolerance 0.00001°)
Sync_from{Coord:symb_rotangle_correct_1000}	Rotation angle fractional part check (tolerance 0.001°)
Sync_from{Coord:l_correct}	Element length check
Strict Checks (tolerance 0.000001 mm)
Sync_from{Coord:symb_pos_correct_hard}	General check of start/end points (returns FALSE if a fractional part exists in one of the coordinates)
Sync_from{Coord:symb_pos_x_correct_hard}, Sync_from{Coord:symb_pos_y_correct_hard}	Strict X/Y check
Sync_from{Coord:symb_pos_sx_correct_hard}, Sync_from{Coord:symb_pos_sy_correct_hard}	Strict start point check
Sync_from{Coord:symb_pos_ex_correct_hard}, Sync_from{Coord:symb_pos_ey_correct_hard}	Strict end point check
Sync_from{Coord:l_correct_hard}	Strict element length check
Checks Relative to User Origin
Sync_from{Coord:symb_pos_lo_correct}	General check of start/end points (returns FALSE if a fractional part exists in one of the coordinates) (v1.73+)
Sync_from{Coord:symb_pos_lo_x_correct}, Sync_from{Coord:symb_pos_lo_y_correct}	X/Y check (v1.73+)
Sync_from{Coord:symb_pos_lo_sx_correct}, Sync_from{Coord:symb_pos_lo_sy_correct}	Start point check (v1.73+, walls/beams)
Sync_from{Coord:symb_pos_lo_ex_correct}, Sync_from{Coord:symb_pos_lo_ey_correct}	End point check (v1.73+, walls/beams)
Sync_from{Coord:symb_pos_lo_correct_hard}	Strict general check (v1.73)
Sync_from{Coord:symb_pos_lo_x_correct_hard}, Sync_from{Coord:symb_pos_lo_y_correct_hard}	Strict X/Y check (v1.73+)
Sync_from{Coord:symb_pos_lo_sx_correct_hard}, Sync_from{Coord:symb_pos_lo_sy_correct_hard}	Strict start point check (v1.73+, walls/beams)
Sync_from{Coord:symb_pos_lo_ex_correct_hard}, Sync_from{Coord:symb_pos_lo_ey_correct_hard}	Strict end point check (v1.73+, walls/beams)
Checks Relative to Project Location
Sync_from{Coord:symb_pos_sp_correct}	General check of start/end points (returns FALSE if a fractional part exists in one of the coordinates) (v1.77+)
Sync_from{Coord:symb_pos_sp_x_correct}, Sync_from{Coord:symb_pos_sp_y_correct}	X/Y check (v1.77+)
Sync_from{Coord:symb_pos_sp_sx_correct}, Sync_from{Coord:symb_pos_sp_sy_correct}	Start point check (v1.77+, walls/beams)
Sync_from{Coord:symb_pos_sp_ex_correct}, Sync_from{Coord:symb_pos_sp_ey_correct}	End point check (v1.77+, walls/beams)
Sync_from{Coord:symb_pos_sp_correct_hard}	Strict general check (v1.73)
Sync_from{Coord:symb_pos_sp_x_correct_hard}, Sync_from{Coord:symb_pos_sp_y_correct_hard}	Strict X/Y check (v1.77+)
Sync_from{Coord:symb_pos_sp_sx_correct_hard}, Sync_from{Coord:symb_pos_sp_sy_correct_hard}	Strict start point check (v1.77+, walls/beams)
Sync_from{Coord:symb_pos_sp_ex_correct_hard}, Sync_from{Coord:symb_pos_sp_ey_correct_hard}	Strict end point check (v1.77+, walls/beams)
Special Checks
Sync_from{Coord:has_distant_element}	Checks for the presence of elements in the project located far from the coordinate origin. The distance is determined by ArchiCAD itself. (v1.76+)

Command	Description
Sync_from{Glob:GLOB_NORTH_DIR}	North direction in degrees
Sync_from{Glob:GLOB_PROJECT_LONGITUDE}	Longitude in degrees
Sync_from{Glob:GLOB_PROJECT_LATITUDE}	Latitude in degrees
Sync_from{Glob:GLOB_PROJECT_ALTITUDE}	Altitude in meters
Sync_from{Glob:GLOB_SUN_AZIMUTH}	Sun position component in degrees
Sync_from{Glob:GLOB_SUN_ALTITUDE}	Sun position component in degrees
Sync_from{Glob:surveyPointPosition_x}, Sync_from{Glob:surveyPointPosition_y}, Sync_from{Glob:surveyPointPosition_z}	Project location point coordinates (v1.77+)
Sync_from{Glob:eastings}	Easting position in the target coordinate reference system (v1.77+)
Sync_from{Glob:northings}	Northing position in the target coordinate reference system (v1.77+)
Sync_from{Glob:orthogonalHeight}	Orthogonal height relative to the specified vertical datum (v1.77+)
Sync_from{Glob:xAxisAbscissa}	Easting value of the endpoint of the vector defining the local x-axis of the engineering coordinate system (v1.77+)
Sync_from{Glob:xAxisOrdinate}	Northing value of the endpoint of the vector defining the local x-axis of the engineering coordinate system (v1.77+)
Sync_from{Glob:scale}	Scale used if the CRS units differ from the engineering coordinate system units (v1.77+)

* Sync_to{Info:PROPERTY_NAME} - Writes the property value to a custom property in the project information. Works only when synchronizing all elements or when synchronizing selected elements.

Command	Description
Sync_from{Morph:L}	Total length of the morph line
Sync_from{Morph:Lx}, Sync_from{Morph:Ly}, Sync_from{Morph:Lz}	Length along the X/Y/Z axes
Sync_from{Morph:Max_x}, Sync_from{Morph:Max_y}, Sync_from{Morph:Max_z}	Maximum coordinates along the axes
Sync_from{Morph:Min_x}, Sync_from{Morph:Min_y}, Sync_from{Morph:Min_z}	Minimum coordinates along the axes
Sync_from{Morph:A}, Sync_from{Morph:B}, Sync_from{Morph:ZZYZX}	Bounding box dimensions (analogous to library elements)

v1.72+ To include user-defined building material properties, add {@property:buildingmaterialproperties} to the description.

Command	Description
Sync_from{Material:Layers; "TEMPLATE"}	Outputs the layer composition of the construction.
Sync_from{Material:Layers,PEN_NUMBER; "TEMPLATE"}	Composition of the profile at the intersection with the pen line (v1.6)
Sync_from{Material:Layers_inv; "TEMPLATE"}	Outputs layers in reverse order (v1.70)
Sync_from{Material:Layers_auto; "TEMPLATE"}	Automatically determines layer order (as in preview) (v1.70)
Sync_from{Material:Layers; "TEMPLATE <FORMULA>"}	Output with calculation of expressions inside <> (v1.72)
Sync_from{Material:Layers,all; "TEMPLATE"}	Outputs all layers of the construction (automatic thickness determination) (v1.77)
Sync_from{Material:Layers,unic; "TEMPLATE"}	Outputs unique layers (merges identical materials) (v1.77)

For user-defined material properties, add {@property:buildingmaterialproperties} to the description.

• Sync_to{Attribute:Layer} - the search is performed by the full layer name (with extension)

• Sync_from{Element:Material overridden} - Is material override enabled or disabled?
• Sync_from{Element:Zone manual poly} - Is the Zone created manually, with all edges static? v1.78
• Sync_from{Element:zone by ref line} - Is the Zone surrounded by the reference line of Walls, not the side lines? v1.78

Processes pipes, ducts, transitions, bends, and routes. Example file for AC28

Command	Description
Sync_from{MEP:reference set name}	Name of the main table with diameters
Sync_from{MEP:element set name}	Name of the element table (pipe/bend/transition)
Sync_from{MEP:width}	Cross-section width
Sync_from{MEP:height}	Cross-section height
Sync_from{MEP:wall thickness}	Wall thickness (pipes/ducts)
Sync_from{MEP:bend radius}	Bend radius
Sync_from{MEP:description}	Description from the settings table
Sync_from{MEP:shape}	Cross-section shape
Sync_from{MEP:length}	Element length (does not apply to bends)
Sync_from{MEP:insulation thickness}	Insulation thickness
Sync_from{MEP:system}	System name
Sync_from{MEP:routing length}	Length of the routing segment containing the element
Sync_from{MEP:physical system name}	v1.78+ System name in the MEP Systems Browser
Sync_from{MEP:physical system group name}	v1.78+ System group name in the MEP Systems Browser

• Enable classification for unclassified elements - add some_stuff_class to the class description.

• Sync_to{Class:CLASSIFICATION_NAME} Text property. Search is performed by Class Id.

• Sync_from{Class:CLASSIFICATION_NAME; FullName} - outputs the full class name

Example file for AC25

This function allows working with tabular data in txt/csv format loaded into the library.

Command	Description
Sync_from {File:LOOKUP; "FILE_NAME", RETURN_COLUMN_NUMBER, Property:PROPERTY_NAME, SEARCH_COLUMN_NUMBER}	Searches the loaded file for the property value in the specified search column and returns the corresponding value from the given return column. This function is analogous to the LOOKUP function in Microsoft Excel and allows extracting data from an external file based on matching an element's property value.
Sync_from { File:LOOKUP; Property:PROPERTY_NAME_WITH_FILE_NAME, RETURN_COLUMN_NUMBER, Property:PROPERTY_NAME, SEARCH_COLUMN_NUMBER }	Similar to the previous function, but the file name is specified in a separate property. Allows changing the search file based on formulas.

Similar to synchronization within a single element, with the addition of the *sub suffix. For example, Sync_from_sub{Property:GROUP_NAME/PROPERTY_NAME}, written in a Curtain Wall, will read the property from a nested element (panel, frame, accessory). Similarly, Sync_to_sub{Property:GROUP_NAME/PROPERTY_NAME} works.

• Sync_reset - Resets the property everywhere - in placed elements, in favorites, on layouts - everywhere. Synchronization of the reset property is disabled while Sync_reset is present in the description. Does not work in AC27...29 versions

Create a field named Addon_Dimensions in the project information. Enter the rules into it. The rule separator is a semicolon.

• "LAYER" - MULTIPLE_MM, CHANGED_TEXT_PREFIX, CONTENT_CHANGE_FLAG

• "LAYER" - MULTIPLE_MM, CHANGED_TEXT_PREFIX, <FORMULA>

• "LAYER" - MULTIPLE_MM, CHANGED_TEXT_PREFIX, CONTENT_CHANGE_FLAG, <FORMULA>

• DIMENSION_PREFIX - MULTIPLE_MM, CHANGED_TEXT_PREFIX, CONTENT_CHANGE_FLAG

• DIMENSION_PREFIX - MULTIPLE_MM, CHANGED_TEXT_PREFIX, <FORMULA>

• DIMENSION_PREFIX - MULTIPLE_MM, CHANGED_TEXT_PREFIX, CONTENT_CHANGE_FLAG, <FORMULA>

Example file for AC25

Elements with identical values of the criterion property are assigned identical numbers (positions). Renumbering is performed only upon manual execution of the function.

v1.74 If only one element is selected, all elements on visible layers for which the selected element's renumbering rules are available will be processed.

After renumbering, synchronization of the selected elements is automatically launched.

Flag for enabling renumbering in one of the formats

• Renum_flag{property name with rule}

• Renum_flag{property name with rule ; NULL}

• Renum_flag{property name with rule ; SPACE} v1.6+

• Renum_flag{property name with rule ; ALLNULL}

Rule property for position in one of the formats

• Renum{criterion property name}

• Renum{criterion property name; grouping property name}

Example file for AC25

Values of properties are summed for elements with the same criterion property. Summation is performed only when the function is manually executed.

Numerical values are summed; text values are concatenated, including only unique values. The default separator is a semicolon. A summation flag is not required; values of all selected elements are summed. After summation, synchronization of the selected elements is automatically launched.

v1.74 If only one element is selected - all elements from visible layers, for which the summation rules of the selected element are available, will be processed.

• Sum{Property:GROUP_NAME/SUMMED_PROPERTY_NAME; Property:GROUP_NAME/CRITERION_PROPERTY_NAME}

• Sum{Property:GROUP_NAME/SUMMED_PROPERTY_NAME; Property:GROUP_NAME/CRITERION_PROPERTY_NAME; separator} to specify a separator other than ;

• Sum{Property:GROUP_NAME/SUMMED_PROPERTY_NAME; Property:GROUP_NAME/CRITERION_PROPERTY_NAME; max} - outputs the maximum value, for numerical properties v1.72+

• Sum{Property:GROUP_NAME/SUMMED_PROPERTY_NAME; Property:GROUP_NAME/CRITERION_PROPERTY_NAME; min} - outputs the minimum value, for numerical properties v1.72+