| BaseModules | The base modules with a definition that is similar to the plug-in structure. | 
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| CircularReferenceFinder<INPUT,TARGET> | Helper class to find circular references. | 
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| ComponentPrinter | The component printer class will print a "frame" window or a component inside a "frame". | 
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| DSize | A size with double's. | 
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| EnumeratorFromIterator<T> | Class that converts an Iterator to Enumerator interface, i.e. | 
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| GenericListener<LISTENER_INTERFACE> | Class to handle generic listeners in a thread-safe manner. | 
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| HostNameOrAddress | The host name and/or IP address, used to look-up region location information. | 
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| IcoUtilities | Utility to create an ICO file from transparent PNG files (or opaque JPG files). | 
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| ILog | Class handling logging for a module in the system, also maybe with specific settings in regards to log levels and log redirectors. | 
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| IntArrayList | Class mimicking the behavior of ArrayList with Integer without collection support. | 
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| LocaleInfo | The LocaleInfo class contains information of the system-global or client session specific Locale, Currency, NumberFormat, date and time format. | 
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| LogEntry | The log entry. | 
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| Loggers | The class that manages all ILoginstances in the process and it's threads or thread groups. | 
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| LogStreamRedirector | Input stream redirector class to the IIZI log. | 
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| Messages | Class to handle localized messages. | 
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| OutputReader | Output stream reader class. | 
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| Position | A position with integers. | 
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| PropProgressMonitor | The progress monitor implementation. | 
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| ReadTransaction | This transaction class is used for all communication between the Server, Client and Remote Administration programs. | 
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| Rect | Simple rectangle class for multiple use accepting negative width and height. | 
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| RFCDate | Date/Time Formats (Full Date). | 
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| SchemaConst | Constants required for the client, server and editor environments are placed in this class holding the schema file definitions along with the directory (package name). | 
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| SendTransaction | This transaction class is used for all communication between the Server, Client and Remote Administration programs. | 
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| ServerConstants | Static class holding constants used for the Server. | 
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| SessionInfo | This class contains information of the remote party and its connection, etc. | 
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| SingleRetriggerableTask | As single-runner task that is run by a trigger and will run in the worker. | 
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| Size | A size with integers. | 
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| StringUtils | String utilities. | 
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| SystemConfig | System configuration class. | 
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| TimeoutTimer | Class that handles a timeout timer that can be started, retriggered, stopped. | 
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| URIParamsTokenizer | A tokenizer class for the URI query string. | 
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| Utilities | This is a utility class containing static helper functions. | 
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| Value | This is the base class for all data values that are stored in VirtualSpace. | 
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| Worker | The Worker is a class that handles all communication with "plain" sockets, received and sent (pending) messages to connectors, along with handling the session queue. | 
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| WorkerTask<TASK_ID,PARAM,RESULT> | The WorkerTask is something that requires processing in the Worker queue or some IO operations, etc. | 
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| WriteCache | This class is used to handle writing strings to the cache used from the server to the client in transactions. | 
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| XMLUtilities | Helper class containing utility methods used when processing XML documents. | 
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