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      <dia:attribute name="text">
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            <dia:string>#Repository#</dia:string>
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      <dia:attribute name="text">
        <dia:composite type="text">
          <dia:attribute name="string">
            <dia:string>#Model#</dia:string>
          </dia:attribute>
          <dia:attribute name="font">
            <dia:font family="sans" style="0" name="Helvetica"/>
          </dia:attribute>
          <dia:attribute name="height">
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      <dia:attribute name="text">
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            <dia:string>#Application#</dia:string>
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          <dia:attribute name="font">
            <dia:font family="sans" style="0" name="Helvetica"/>
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          <dia:attribute name="height">
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      <dia:attribute name="text">
        <dia:composite type="text">
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            <dia:string>#Persistent storage mechanism#</dia:string>
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            <dia:font family="sans" style="0" name="Helvetica"/>
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          <dia:attribute name="height">
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      <dia:attribute name="text">
        <dia:composite type="text">
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            <dia:string>#In-memory working model#</dia:string>
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          <dia:attribute name="font">
            <dia:font family="sans" style="0" name="Helvetica"/>
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          <dia:attribute name="height">
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        <dia:rectangle val="6.425,20.205;16.05,20.95"/>
      </dia:attribute>
      <dia:attribute name="text">
        <dia:composite type="text">
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            <dia:string>#Data access interface for user#</dia:string>
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          <dia:attribute name="font">
            <dia:font family="sans" style="0" name="Helvetica"/>
          </dia:attribute>
          <dia:attribute name="height">
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            <dia:string>#Write updated data to disk
Read queried data from disk
Notify on data updates#</dia:string>
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            <dia:font family="sans" style="0" name="Helvetica"/>
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      <dia:attribute name="text">
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            <dia:string>#Provide fast access to working data
Update repository periodically
Update itself on repository notification
Provide API for data changes and queries#</dia:string>
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            <dia:font family="sans" style="0" name="Helvetica"/>
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            <dia:string>#Provide data change and retrieval UI
Ask model to save changes
Update model when user requests a change
Update UI when model changes
Query model to fill UI with data#</dia:string>
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