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+'\"macro stdmacro
+.\"
+.\" Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
+.\"
+.\" This program is free software; you can redistribute it and/or modify it
+.\" under the terms of the GNU General Public License as published by the
+.\" Free Software Foundation; either version 2 of the License, or (at your
+.\" option) any later version.
+.\"
+.\" This program is distributed in the hope that it will be useful, but
+.\" WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+.\" or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+.\" for more details.
+.\"
+.\"
+.TH PMLOADNAMESPACE 3 "PCP" "Performance Co-Pilot"
+.SH NAME
+\f3pmLoadNameSpace\f1 \- load a local PMNS for an application
+.SH "C SYNOPSIS"
+.ft 3
+#include <pcp/pmapi.h>
+.sp
+int pmLoadNameSpace(const char *\fIfilename\fP);
+.sp
+cc ... \-lpcp
+.ft 1
+.SH DESCRIPTION
+If the application wants to force using a local Performance Metrics
+Name Space (PMNS) instead of a distributed PMNS then it
+must load the PMNS using
+.B pmLoadNameSpace
+or
+.BR pmLoadASCIINameSpace (3).
+If the application is to use a distributed PMNS, then it should NOT
+make a call to load the PMNS explicitly.
+.PP
+The
+.I filename
+argument designates the PMNS of interest.
+For applications not requiring a tailored PMNS,
+the special value
+.B PM_NS_DEFAULT
+may be
+used for
+.IR filename ,
+to force the default local PMNS to be loaded.
+.PP
+The default local PMNS is found in the file
+.I $PCP_VAR_DIR/pmns/root
+unless the environment variable
+.B PMNS_DEFAULT
+is set, in which case the value is assumed to be the pathname
+to the file containing the default local PMNS.
+.PP
+Externally a PMNS is stored in an ASCII format as
+described in
+.BR pmns (5).
+.PP
+By default,
+multiple names in the PMNS are not allowed to be
+associated with a single Performance
+Metrics Identifier (PMID).
+.BR pmLoadASCIINameSpace (3)
+provides an alternative interface with user-defined control
+over the processing of duplicate PMIDs in the PMNS.
+.PP
+.B pmLoadNameSpace
+returns zero on success.
+.SH FILES
+.IP \f2$PCP_VAR_DIR/pmns/root\f1 2.5i
+the default local PMNS, when the environment variable
+.B PMNS_DEFAULT
+is unset
+.RE
+.SH "PCP ENVIRONMENT"
+Environment variables with the prefix
+.B PCP_
+are used to parameterize the file and directory names
+used by PCP.
+On each installation, the file
+.I /etc/pcp.conf
+contains the local values for these variables.
+The
+.B $PCP_CONF
+variable may be used to specify an alternative
+configuration file,
+as described in
+.BR pcp.conf (5).
+Values for these variables may be obtained programmatically
+using the
+.IR pmGetConfig (3)
+function.
+.SH SEE ALSO
+.BR PMAPI (3),
+.BR pmGetConfig (3),
+.BR pmLoadASCIINameSpace (3),
+.BR pmTrimNameSpace (3),
+.BR pcp.conf (5),
+.BR pcp.env (5)
+and
+.BR pmns (5).
+.SH DIAGNOSTICS
+Syntax and other errors in the parsing of the PMNS are reported
+on
+.I stderr
+with a message of the form ``Error Parsing ASCII PMNS: ...''.
+.PP
+.B PM_ERR_DUPPMNS
+.IP
+It is an error to try and load more than one PMNS, or to call
+either
+.B pmLoadNameSpace
+and/or
+.BR pmLoadASCIINameSpace (3)
+more than once.
+.PP
+.B PM_ERR_PMNS
+.IP
+Syntax error in the PMNS file.