<?xml version="1.0" encoding="UTF-8"?>
<!-- 
    DTR1 IVL_PQ - Interval of Physical Quantity
    Status: draft
-->
<rule abstract="true" id="IVL_MO" xmlns="http://purl.oclc.org/dsdl/schematron">
    <extends rule="SXCM_MO"/>

    <!--<assert role="error" test="(@nullFlavor and not(@value|@unit|hl7:*)) or (not(@nullFlavor) and (@value|hl7:*))" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-1-IVL_MO: null violation. Cannot have @nullFlavor and @value or child elements, or the other way around</assert>-->
    <assert role="error" test="not(descendant-or-self::*[@nullFlavor and (@value|@unit|hl7:low|hl7:center|hl7:high|hl7:width)])" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-2-IVL_MO: null violation. Cannot have @nullFlavor and @value or other child elements</assert>
    
    <assert role="error" test="not(@value and hl7:* except hl7:translation)" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-3-IVL_MO: co-occurence violation. Cannot have @value and other child elements except translations</assert>
    <!-- unsure where this rule comes from KH 2016-07-22
    <assert role="error" test="@nullFlavor or descendant-or-self::*[@value]" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-4-1-IVL_MO: co-occurence violation. Must have @nullFlavor or @value or child elements with @value</assert>
        -->
    <assert role="error" test="not(@value and (hl7:low|hl7:center|hl7:high|hl7:width))" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-4-2-IVL_MO: co-occurence violation. Cannot have @value and child elements</assert>
    <assert role="error" test="not(hl7:center and (hl7:low|hl7:high|hl7:width))" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-4-3-IVL_MO: co-occurence violation. Cannot have center and other elements</assert>
    <assert role="error" test="not(hl7:width and hl7:low and hl7:high)" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-4-4-IVL_MO: co-occurence violation. Cannot have width and have both low and high elements</assert>
    <assert role="error" test="not(hl7:*[@updateMode])" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-5-IVL_MO: no updateMode on IVL attributes</assert>
    
    <!--<assert role="error" test="not(hl7:low/@value = hl7:high/@value)" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-6-IVL_MO: low/@value must not be equal to high/@value</assert>-->
    
    <!-- width has datatype PQR, which extends CV ((){1}(((0[1-9])|([12]\d)|(3[01]))?)?)? -->
    <assert role="error" test="not(hl7:width[@unit][not(@value)])" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-1-PQR: width element: no unit without value</assert>
    <assert role="error" test="not(hl7:width/hl7:translation)" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-2-PQR: width element: no translation</assert>
    
    <assert role="error" test="not(hl7:low/@value and hl7:high/@value) or hl7:low/number(@value) &lt;= hl7:high/number(@value)" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-7-IVL_MO: low/@value must be lower than or equal to high/@value</assert>
    <assert role="error" test="not(hl7:low[@nullFlavor='PINF'])" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-7-1-IVL_MO: low must be lower than or equal to high. Found low boundary PINF (Positive Infinity)</assert>
    <assert role="error" test="not(hl7:high[@nullFlavor='NINF'])" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-7-2-IVL_MO: low must be lower than or equal to high. Found high boundary NINF (Negative Infinity)</assert>

    <assert role="error" test="not(hl7:low/@currency and hl7:high/@currency) or hl7:low/@currency = hl7:high/@currency" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-8-IVL_MO: currency in low and high must be equal</assert>
    
    <assert role="error" test="not(hl7:translation and hl7:* except hl7:translation)" see="https://docs.art-decor.org/documentation/datatypes/DTr1_IVL_MO"
        >dtr1-9-IVL_MO: co-occurence violation. Cannot have translation and other child elements except translation</assert>
</rule>
