1. A computer implemented method for changing the style of a graphics chart, the method comprising: generating a graphic chart in a first portion of a display of a diagramming application, wherein the graphic chart includes a parent graphic object, a child graphic object, and a transition graphic object; automatically generating a semantic model based on the generated graphic chart in a second portion of a display of the diagramming application, the semantic model being configured to describe the organization of the graphic chart by displaying text strings of the graphic chart in a hierarchical format, wherein a parent text string of the parent graphic object is semantically indicated in the hierarchical format as a top level, wherein a child text string of the child graphic object is semantically indicated in the semantic model as a subordinate level indented in relation to the top level, wherein the transition graphic object is semantically indicated in the hierarchal format as connecting the top level to the subordinate level; receiving a style transformation selection from a user interface; accessing a style transformation model based on the style transformation selection, the style transformation model including style values for configuring the style of the graphics chart; generating a style transformation definition, wherein the style transformation definition is generated by identifying the semantically indicated top level of the semantic model, identifying the semantically indicated subordinate level of the semantic model, and identifying the semantically indicated connection between the top level and the subordinate level, wherein a style value is determined from the style transformation model based on the semantically indicated top level of the semantic model, the semantically indicated subordinate level of the semantic model, and the semantically indicated connection between the top level and the subordinate level; applying the generated style transformation definition to the graphic chart to render the graphic chart according to the style value of the style transformation definition, wherein the determined style value is applied to the parent graphic object, the child graphic object, and the transition graphic object; receiving a first change to modify the subordinate level semantically indicated in the semantic model in the second portion of the display of the diagramming application, wherein, in response to the first change, automatically changing a position of the child graphic object in the graphic chart in the first portion of the display of the diagramming application; and receiving a second change to modify the child text string semantically indicated in the semantic model in the second portion of the display of the diagramming application, wherein, in response to the second change, automatically changing text of the child graphic object in the graphic chart in the first portion of the display of the diagramming application to reflect the second change.