+,ccRecord,NULL-method
                        Adding nothing to a ccRecord object and return
                        the original ccRecord
+,ccRecord,ccEpisode-method
                        Adding one ccEpisode object to a ccRecord
+,ccRecord,ccRecord-method
                        Combine two ccRecord objects
+,ccRecord,list-method
                        Adding a list of ccEpisode to ccRecord
ITEM_REF                Field reference table
StdId                   S4 class to hold standard IDs such as
                        "NIHR_HIC_ICU_0001"
[,ccRecord,ANY-method   Create a subset of ccRecord object from the
                        original one via specifying the row number of
                        episodes.
[,ccRecord,character-method
                        Create a ccRecord subsetting via selected
                        sites.
[[,ccRecord-method      Subsetting a ccRecord object and return a list
                        of ccEpisode objects.
as.number               Convert standard IDs to numbers (character)
                        which can be used for indexing.
ccEpisode-class         The S4 class which holds data of a single
                        episode.
ccRecord-class          The S4 class which holds all the CCHIC patient
                        record - served as a database.
ccTable-class           Process the EHR data in table format
ccTable_apply_filters   Apply all the setup filters.
ccTable_clean           Apply all the filters
ccTable_create_cctable
                        Create a ccTable object
ccTable_export_csv      Export the clean table as a CSV file
ccTable_filter_categories
                        Categorical data filter
ccTable_filter_missingness
                        Data missing filter
ccTable_filter_nodata   No data filter
ccTable_filter_range    Numerical range filter
ccTable_reload_conf     Reload the YAML configuration file
ccTable_reset           Reset the ccTable
ccd                     Synthetic example dataset
ccd_demographic_spell   Create demographic table with spell IDs
ccd_demographic_table   Create the demographic tables, which includes
                        all non-time-varying variables.
ccd_select_table        Create the table for ccTable from ccRecord
ccd_unique_spell        find the unique spell ID.
code2stname             Convert NHIC codes to the short names
create2dclean           Clean table - low memory
create_cctable          Create a ccTable object
data.checklist          This a reference table of NHIC data items.
data.quality.report     Create the data quality report
data.quality.report.brc
                        Create the data quality report
deltaTime               Convert calendar date-time to the time
                        difference comparing to the ICU admission time.
demg.distribution       demg.distribution Create a plot of the
                        distribution of numerical demographic data.
demographic.data.completeness
                        Create a demographic completeness table (in
                        pander table)
extract_file_origin     Extract the original file name from a path and
                        file removing all the suffixes.
extract_info            Extract information from data.checklist
file.summary            Produce a file summary table
for_each_episode        loop over all episodes of a ccRecord object
getEpisodePeriod        Get the length of stay based on the first and
                        the last data point.
getXmlepisode           get the episode data from xml
icnarc2diagnosis        Convert ICNARC codes to diagnosis (text)
icnarc_table            ICNARC diagnosis reference table
inrange                 Check if the values of a vector v is in the
                        given ranges.
is.demographic          Check if the item NHIC code or short name
                        belongs to the demographic category.
is.drugs                Check if the item NHIC code or short name
                        belongs to the drugs category.
is.laboratory           Check if the item NHIC code or short name
                        belongs to the Laboratory category.
is.physiology           Check if the item NHIC code or short name
                        belongs to the physiology category.
lenstay                 Calculate the length of stay in the ICU.
long2stname             Convert long names to short names.
lookup.items            Lookup items information by keywords
new.episode             Create a new episode
physio.distribution     Plot the physiological data distribution.
plot_episode            Individual episode chart
plot_episode,ccEpisode,character-method
                        Episode chart
plot_episode,ccEpisode,missing-method
                        Episode chart default fields
reallocateTimeRecord    Propagate a numerical delta time interval
                        record.
samplerate2d            Produce a pander table of sample rate of
                        longitudinal data.
site.info               Produce a site id reference table.
stname2code             Convert short names to NHIC codes
stname2longname         Convert short names to long names.
table1                  Produce the item specified table one.
total.data.point        Return total data point of the ccRecord object.
which.classification    Identify the classification - classification1
whichIsCode             give id number from NHIC code like
                        "NIHR_HIC_ICU_xxxx"
xml.file.duration.plot
                        plot the duration of XML files.
xml.site.duration.plot
                        Plot the XML duration in terms of sites.
xml2Data                Convert the XML file to ccRecord
xmlLoad                 load xml clinical data
xmlTime2POSIX           Convert time from xml to POSIX format.
