IntelliJ IDEA is missing attributes of ui:repeat - jsf

Question

I am developing a JSF 2.2.12 application with IntelliJ IDEA 2016.2.1 Ultimate. The problem is that many of the attributes of ui:repeat (and possibly other components) are missing.
For example, I'd like to use the step attribute of ui:repeat, as defined here. When I attempt to use it, this is what happens:
If I ctrl + click on repeat to go to its source, and I am taken to the file
...\IntelliJ IDEA 2016.2.1\plugins\JSF\lib\jsf-support.jar!\resources\schemas\ee7\tld\jsf-ui.tld
which has this definition of repeat:
<tag>
<name>repeat</name>
<tag-class></tag-class>
<tei-class></tei-class>
<body-content>JSP</body-content>
<description>
<![CDATA[
The repeat tag should be used in almost all cases instead of the c:forEach to iterate over content with JSF.
The repeat tag is often used in conjunction with the jsfc feature.
]]>
</description>
<attribute>
<name>id</name>
<required>false</required>
<rtexprvalue>false</rtexprvalue>
<description></description>
</attribute>
<attribute>
<name>value</name>
<required>true</required>
<rtexprvalue>false</rtexprvalue>
<description>The name of a collection of items that this tag iterates over. The collection may be a List, array, java.sql.ResultSet, or an individual java Object. If the collection is null, this tag does nothing.</description>
</attribute>
<attribute>
<name>var</name>
<required>true</required>
<rtexprvalue>false</rtexprvalue>
<description>The literal name of the variable to use while iterating.</description>
</attribute>
</tag>
The only attributes defined are id, value, and var! Why are the other attributes not here?
Here is my pom.xml entry for JSF:
<dependency>
<groupId>com.sun.faces</groupId>
<artifactId>jsf-api</artifactId>
<version>2.2.12</version>
<scope>provided</scope>
</dependency>