1. A system comprising hardware and software stored on at least one non-transitory storage medium, said system for managing advisories for complex model nodes comprising: a complex model configured to graphically represent a user-defined system as a plurality of nodes and relationships between the plurality of nodes, wherein the complex model comprises multiple data models that include a notation model and a semantic model, which are two distinct entities that are digitally encoded in a storage medium in a manner distinct from each other, wherein the notational model defines graphical characteristics of the complex model including graphical representations for nodes of the complex model including a shape of the nodes and edges connecting nodes to each other, wherein the semantic model stores capability and requirements parameters of nodes and stores semantic relationships between related nodes used by the advisory manager to determine if existing notifications of related nodes are to be aggregated to or not based on values of the capability and requirements parameters and based on content of the existing notifications; a graphical modeling application stored on at least one non-transitory storage medium configured to support execution of a plurality of operations upon the complex model, wherein said graphical modeling application stores data defining graphical characteristics of the complex model in the notation model and stores data defining semantic characteristics of the complex model in the semantic model, wherein the notation model and the semantic model are stored in the storage medium as separate data entities; the graphical modeling application further configured to generate notifications, wherein the notifications indicate problems or potential problems with a current state of the complex model; and the advisory manager configured to aggregate notifications from different ones of the nodes that are related to each other based on the semantic model information and potential resolutions for the plurality of nodes of the complex model, wherein said aggregated notifications and potential resolutions are visually presented within the graphical modeling application.