Systems and methods facilitate decision support based on dynamic expression data stored in memory. The dynamic expression data includes a plurality of expressions, each expression representing a different condition that varies as a function of one or more variables. A user interface can be programmed to assign a given expression to a selected visualization space in response to a user input. A data interface can receive values from at least one data source for each variable in the given expression. An output engine can be programmed to populate the selected visualization space with information based on each condition defined by the given expression that has been assigned to the selected visualization space.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A system to facilitate decision support comprising: dynamic expression data stored in memory, the dynamic expression data including a plurality of expressions, each expression representing a different clinical condition that varies as a function of one or more variables; a user interface programmed to assign a given expression to a selected visualization space in response to a user input; an interface to receive values from at least one data source for each variable in the given expression; and an output engine programmed to populate the selected visualization space of a display with information based on each condition defined by the given expression that has been assigned to the selected visualization space. 2. The system of claim 1, wherein the visualization space comprises a layout, the output engine controlling the layout based on each condition defined by the given expression that has been assigned to each area of the layout. 3. The system of claim 2, wherein each area of the layout includes placeholders, the output engine being programmed dynamically populate the layout with a corresponding visualization based on the given expression that has been assigned to each respective placeholder. 4. The system of claim 3, wherein the placeholder comprises a portion of the visualization space programmed to represent at least one of a clinical condition or a clinical location, the output engine dynamically populating each respective with an encounter graphical user interface element based on a value of the one or more variables of the given expression that has been assigned to each respective placeholder. 5. The system of claim 4, wherein different placeholders of the visualization space are assigned different ones of the plurality of expressions in response to an assignment user input. 6. The system of claim 1, wherein the visualization space comprises an alert guidance. 7. The system of claim 6, wherein the alert guidance comprises a global alert that is provided to each user that is logged in to the system in response to a corresponding alert condition being met based on a value of at least one variable in a selected one of the plurality of expressions that is assigned to the global alert. 8. The system of claim 6, wherein the alert guidance comprises a personalized user-specific alert that is provided to a respective user based on a value of at least one variable in a selected one of the plurality of expressions that is assigned to the personalized user-specific alert. 9. The system of claim 6, wherein the alert guidance further comprises guidance data that is computed based on the selected one of the plurality of expressions having value that defines when a corresponding alert condition is active, the guidance data having a mode for controlling a visualization of the alert condition in the visualization space based on a relative timing of when the alert condition is triggered. 10. The system of claim 9, further comprising a guidance component to control the visualization of the alert condition to differentiate between the alert condition and a subsequent non-alert condition that occurs after the alert condition is resolved based on the selected one of the plurality of expressions. 11. The system of claim 10, wherein the guidance component is programmed to gradually transition the visualization from the subsequent non-alert condition to a predefined normal condition over a predetermined time period, information about the alert condition being available during the transition in response to a predetermined user input but not available in the visualization space after the transition. 12. The system of claim 10, wherein the guidance component is programmed to control the visualization of the alert condition by graphically discriminating between initial alert condition and persisting alert condition, an indication of a duration for the persisting alert condition being presented in the visualization space. 13. The system of claim 1, wherein the one or more variables comprises a real-time variable, the interface being configured to receive substantially real-time input data to enable the output engine to analyze the given expression and provide guidance in substantially real time in based on a value of the real-time input data corresponding the one or more variables in the given expression that is assigned to the visualization space. 14. The system of claim 1, further comprising an expression builder programmed to generate a dynamic expression in response to a user input selecting the one or more variables to define a corresponding clinical condition. 15. The system of claim 14, wherein the dynamic expression comprises an n-dimensional expression corresponding to an evidence-based surface function, where n is a positive integer greater than one denoting the number of the one or more variables. 16. The system of claim 14, wherein the expression builder comprises a graphical user interface programmed to drag and drop a graphical user interface element corresponding to the selected variable into an expression container interface element to create a relationship between two or more variables in the expression, the relationship being programmable in response to a selection user input. 17. The system of claim 1, further comprising an operational dashboard graphical user interface, which provides an operational visualization space, programmed to provide operational information based on staffing data and timing data associated with each encounter graphical user interface element that is populated in the operational visualization space. 18. The system of claim 1, wherein the output engine comprises a layout component programmed to dynamically populate at least a portion of the visualization space with encounter graphical user interface elements for each encounter based on the given expression that has been assigned to respective areas of the visualization space; and a guidance component programmed to dynamically populate each encounter graphical user interface element in the visualization space with guidance information based on the given expression that has been assigned to each respective encounter graphical user interface element. 19. The system of claim 18, wherein the plurality of expressions employed by the layout component and the guidance component comprise a common set of expressions. 20. A graphical user interface (GUI) to provide clinical decision support, comprising: a GUI element associated with a patient encounter, the GUI element being presented in a visualization space and programmed to provide a status feature for a given alert condition that graphically discriminates between an alert condition and a non-alert condition for a given alert guidance based on a given expression that is assigned to the given alert guidance, after the alert condition is resolved, the status feature being changed gradually over a predetermined time from indicating the alert condition to indicating the non-alert condition; and/or controls to gradually transition a visualization of the status feature from the non-alert condition to a predefined normal non-alert condition over a predetermined time, information about the alert condition being available during the transition in response to a user input, but not available in the visualization space after the transition to the predefined normal non-alert condition; and/or wherein the status feature comprises a color of an encounter GUI element that is presented in the visualization space; and/or wherein the color of the status feature comprises a first color assigned to the alert condition, a second color assigned to the non-alert condition immediately after the alert condition is resolve and a third color assigned to the predefined normal non-alert condition, the controls gradually changing the color of the status feature from the second color to the third color over the predetermined time; and/or wherein the predetermined time is programmable in response to a user input; and/or wherein visualization space comprises an alert guidance that includes a global alert and/or a personalized user-specific alert in response to a corresponding alert condition being met based on a value of at least one variable in a selected one of the plurality of expressions that is assigned to the respective global alert or personalized user-specific alert; and/or wherein the GUI further graphically differentiates between initial alert condition and persisting alert condition, an indication of a duration for the persisting alert condition being presented in the visualization space; and/or wherein the GUI is implemented in a decision support system, the decision support system comprising: dynamic expression data stored in memory, the dynamic expression data including a plurality of expressions, each expression representing a different condition that varies as a function of one or more variables; an assignment user interface programmed to assign a user-selected expression to a selected visualization space in response to a user input; a data interface to receive input data from at least one data source for each variable in the given expression; and an output engine programmed to populate the selected visualization space with information based on each condition defined by the given expression that has been assigned to the selected visualization space, including the given alert guidance.