What is the meaning of '/' in following TIBCO expression - xpath

Question

I have following code in Tibco business works module
$ES_GetInfo/root/pfx4:GetInformationAndPropertyDetailsResponse/pfx4:LicenseInfo/pfx4:CoreEnt/pfx4:Ent
[pfx4:Ent/pfx4:EntOfferingCode = $Read_DB_Data/group/ROW/EOC]
/pfx4:EntState = "Disabled"
I can understand it is comparing "EntOfferingCode" with "EOC", but could not get the expression "/pfx4:EntState = 'Disabled'"?
As per the TIBCO, the whole expression returns a boolean value.
What is the meaning of "/pfx4:entState='Disabled'". Is logical or conditional or something else?

Answer 1

The whole expression is logical condition. The '/' is just xml schema elements separator in XPath (XML Path Language) syntax. You can start learning tibco xpath from here https://docs.tibco.com/pub/activematrix_businessworks/6.3.0/doc/html/GUID-D319018B-AA74-428D-A034-E477778AD2B6.html
The expression first filtering all the "Ent" nodes that have EntOfferingCode = $Read_DB_Data/group/ROW/EOC
then check if exists EntState = "Disabled" in filtered result
the expression can be replaced by
not (empty($Start/pfx:GetInformationAndPropertyDetailsResponse/pfx:LicenseInfo/pfx:CoreEnt/pfx:Ent[ pfx:EntOfferingCode= "EOC" and pfx:EntState = "Disabled"]))
For example
if the schema is like
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns="http://www.tibco.com/schemas/TestProcess/Schema/Schema.xsd"
targetNamespace="http://www.tibco.com/schemas/TestProcess/Schema/Schema.xsd"
elementFormDefault="qualified"
attributeFormDefault="unqualified">
<xs:element name="GetInformationAndPropertyDetailsResponse">
<xs:complexType>
<xs:sequence>
<xs:element ref="LicenseInfo" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="LicenseInfo">
<xs:complexType>
<xs:sequence>
<xs:element ref="CoreEnt" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="CoreEnt">
<xs:complexType>
<xs:sequence>
<xs:element ref="Ent" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="Ent">
<xs:complexType>
<xs:sequence>
<xs:element name="EntOfferingCode" type="xs:string"/>
<xs:element name="EntState" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
Expression return true for:
<?xml version = "1.0" encoding = "UTF-8"?>
<GetInformationAndPropertyDetailsResponse xmlns = "http://www.tibco.com/schemas/TestProcess/Schema/Schema.xsd">
<LicenseInfo>
<CoreEnt>
<Ent>
<EntOfferingCode>EOC</EntOfferingCode>
<EntState>Disabled</EntState>
</Ent>
</CoreEnt>
</LicenseInfo>
</GetInformationAndPropertyDetailsResponse>
Expression return false for:
<?xml version = "1.0" encoding = "UTF-8"?>
<GetInformationAndPropertyDetailsResponse xmlns = "http://www.tibco.com/schemas/TestProcess/Schema/Schema.xsd">
<LicenseInfo>
<CoreEnt>
<Ent>
<EntOfferingCode>EOC</EntOfferingCode>
<EntState>Enabled</EntState>
</Ent>
<Ent>
<EntOfferingCode>EOC1</EntOfferingCode>
<EntState>Disabled</EntState>
</Ent>
</CoreEnt>
</LicenseInfo>
</GetInformationAndPropertyDetailsResponse>
if you just use
$ES_GetInfo/root/pfx4:GetInformationAndPropertyDetailsResponse/pfx4:LicenseInfo/pfx4:CoreEnt/pfx4:Ent/pfx4:EntState = "Disabled"
it will return true for both examples

Answer 2

If your question is what does the xslt expression mean, it is basically checking the following:
For all LicenseInfo/CoreEnt/Ent,
where Ent/EntOfferingCode = EOC value from the DB
check if the corresponding Enstate is Disabled or not
if Disabled, output true, else output false.