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        <link:definition>0610 - Disclosure - Subsequent Event (Details)</link:definition>
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        <link:definition>0609 - Disclosure - Content Rights and Deferred Service Credits (Details)</link:definition>
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        <link:definition>0606 - Disclosure - Business Combination (Details)</link:definition>
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        <link:definition>0605 - Disclosure - Marketable Securities (Details)</link:definition>
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        <link:definition>06041 - Disclosure - Earnings Per Share (Details Textual)</link:definition>
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        <link:definition>0604 - Disclosure - Earnings Per Share (Details)</link:definition>
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        <link:definition>0206 - Disclosure - Business Combination</link:definition>
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        <link:definition>0205 - Disclosure - Marketable Securities</link:definition>
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        <link:definition>06071 - Disclosure - Business Segments (Details 1)</link:definition>
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        <link:definition>0607 - Disclosure - Business Segments (Details)</link:definition>
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        <link:definition>0608 - Disclosure - Collaborative Arrangement (Details)</link:definition>
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        <link:definition>06032 - Disclosure - Stock Based Compensation (Details Textual)</link:definition>
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        <link:definition>06031 - Disclosure - Stock Based Compensation (Details 1)</link:definition>
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        <link:definition>0603 - Disclosure - Stock Based Compensation (Details)</link:definition>
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        <link:definition>0602 - Disclosure - Income Taxes (Details)</link:definition>
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        <link:definition>0507 - Disclosure - Business Segments (Tables)</link:definition>
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        <link:definition>0503 - Disclosure - Stock Based Compensation (Tables)</link:definition>
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        <link:definition>0207 - Disclosure - Business Segments</link:definition>
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        <link:definition>0208 - Disclosure - Collaborative Arrangement</link:definition>
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        <link:definition>0203 - Disclosure - Stock Based Compensation</link:definition>
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        <link:definition>0202 - Disclosure - Income Taxes</link:definition>
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        <link:definition>0110 - Statement - Condensed Consolidated Balance Sheets</link:definition>
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  <element id="hstm_RemainingServiceCreditsToBeIssuedPerYearInFutureYears" name="RemainingServiceCreditsToBeIssuedPerYearInFutureYears" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="hstm_ContentRightsAndDeferredServiceCreditsAbstract" name="ContentRightsAndDeferredServiceCreditsAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hstm_ContentRightsAndDeferredServiceCreditsTextBlock" name="ContentRightsAndDeferredServiceCreditsTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hstm_ContentRightsAndDeferredServiceCreditsTextualAbstract" name="ContentRightsAndDeferredServiceCreditsTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hstm_PreliminaryPurchasePriceAllocationMeasurementPeriod" name="PreliminaryPurchasePriceAllocationMeasurementPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hstm_ExchangeableServiceCreditsExpirationPeriod" name="ExchangeableServiceCreditsExpirationPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hstm_StockBasedCompensationAdditionalTextualAbstract" name="StockBasedCompensationAdditionalTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hstm_WriteDownOfDeferredRevenue" name="WriteDownOfDeferredRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="hstm_NetTangibleAssetsIncludeDeferredRevenueBookValue" name="NetTangibleAssetsIncludeDeferredRevenueBookValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="hstm_NetTangibleAssetsIncludeDeferredRevenueEstimatedFairValue" name="NetTangibleAssetsIncludeDeferredRevenueEstimatedFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="hstm_AcquireeMember" name="AcquireeMember" abstract="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hstm_SubsequentEventTextualAbstract" name="SubsequentEventTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hstm_WorkingCapitalAdjustmentPayment" name="WorkingCapitalAdjustmentPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
</schema>
</XBRL>
