This topic covers the implementation details of TSL_Property.

 

Scope: cSL_Property.pas; class derived from TObject. Prepared from the curated implementation supplied for this review on 2 October 2026.

 

Base serializer for scriptline properties. It adds prop_id, class_name and prop_name to a supplied property node. If the descendant has not created a property node, this base writer creates one and writes status=NOT_IMPLEMENTED.

 

Base ReadFromXML and SaveTextBlobToXML are empty in the supplied unit. A concrete property must supply its payload behavior or inherit it from another implementation. xmlClassName returns ClassName unless overridden.

 

prop_id belongs to the containing script line’s property namespace. FPropId starts at zero; script line property registration supplies the meaningful value. That registration and SetDataValue behavior are outside this package.

 

Notation and shared helper rules: Reading this reference.

 

XML identity and composition

 

No literal rec_type value is emitted directly by the selected routines. A property envelope, an inherited writer or a delegated record can supply its identifying attributes.

 

Exact XML fields and attributes

 

The paths below start at this record or property node. A slash identifies a child element; @ identifies an attribute. Curly braces mark a variable index or expression, not literal XML text. Initial values describe initialization; they do not establish what an omitted individual element does. The Implementation toggle below contains the supplied routines for exact branch order and conversions.

 

status

 

XML representation: The text of the status element.

 

Writing: Stores the literal text “NOT_IMPLEMENTED” when propertyNode is absent.

 

Import: This routine does not read this field. See the inherited or enclosing implementation where applicable.

 

@prop_id

 

XML representation: The prop_id attribute.

 

Writing: Stores the text representation of PropID when propertyNode is absent.

 

Writing: Stores the text representation of PropID whenever the writer reaches this field.

 

property[@prop_id={self.PropID.toString}]/@class_name

 

XML representation: The class_name attribute.

 

Writing: Stores xmlClassName when propertyNode is absent.

 

.[@prop_id={self.PropID.toString}]/@class_name

 

XML representation: The class_name attribute.

 

Writing: Stores xmlClassName whenever the writer reaches this field.

 

property[@prop_id={self.PropID.toString}][@class_name={self.xmlClassName}]/@prop_name

 

XML representation: The prop_name attribute.

 

Writing: Stores PropName when propertyNode is absent.

 

.[@prop_id={self.PropID.toString}][@class_name={self.xmlClassName}]/@prop_name

 

XML representation: The prop_name attribute.

 

Writing: Stores PropName whenever the writer reaches this field.

 

Initialization and reset values

 

TSL_Property.Create

 

 

Storage declarations relevant to interpretation

 

These are in-memory member and property types, not a list of mandatory XML children. They retain array bounds, fixed buffers and selector types. The field reference above defines what is actually serialized.

 

 

Implementation details

 

The Implementation toggle contains only TSL_Property methods. Initializers and helpers belonging to other types are identified separately below. Shared XML-helper limitations are explained in Reading this reference.

 

Implementation